NEWS

1.0.0 -> 1.1.0
  * Add interface for passing the transpose nullspace to PETSc.
  * Fixes for MPI implementations not quite compatible with MPI-2.
  * Generalize/modernize systems_of_equations_ex2,3.
  * Fix/document issues with DirichletBoundary variable ordering.
  * Add new GhostingFunctor interfaces for generalizing which dofs are ghosted.
  * Correctly use MPI_UNSIGNED_LONG_LONG to wrap unsigned long long types.
  * Add TransientSystem<EigenSystem> typedef.
  * Add gather(), allgather() overloads for std::string.
  * Fix pack_range bug.
  * Misc. NemesisIO fixes including writing node/sideset ids and names.
  * Abaqus reader now tolerates whitespace before commas in *NODE sections.
  * Add BoundaryVolumeSolutionTransfer class.
  * Fix FParser AD data file race in parallel.
  * Add --drop-cerr command line argument.
  * Fix warnings by avoiding the possibility of throwing from destructors.
  * Fix multi-dimensional mesh partitioning bug in Metis.
  * Add vector<vector> scatter implementation.
  * Update bundled Eigen from 3.2.5 to 3.2.9.
  * Fix detection of VTK 6.0 (we skipped straight to 6.1 for some reason)
  * Add QUADSHELL4/TRISHELL3 support to Exodus reader, FE, and Mesh classes.
  * Update bundled boost subset from 1.55 to 1.61.
  * Minimum boost version required for building libmesh bumped to 1.57.
  * Remove deprecated Mesh IO classes (DivaIO, LegacyXdrIO, MGF).
  * Fix deprecated header warnings caused by CPPUnit.
  * Misc. infinite elements fixes from Hubert Weissmann.
  * Enhance MeshFunction/PointLocator to work with discontinuous FEM on faces.
  * Enhance System::point_value() interface to make it harder to call incorrectly.
  * Implement DenseMatrix::svd() for --enable-complex builds.
  * Avoid double call to KSPSetFromOptions.
  * Throw exception from TypeTensor::solve() on zero determinant.
  * Handle exceptions thrown by TypeTensor::solve() in FE::inverse_map().
  * Remove previously-deprecated PointLocatorList class.
  * Fix Hypre detection for PETSc 3.6.x+ builds.
  * Use n_active_elem() instead of n_elem() when flagging by elem fraction.
  * Guard Trilinos header includes with ignore/restore warnings headers.
  * Fix issue where the PointLocator _initialized flag was not reset by clear().
  * Add get_array() capability to PetscVector and use internally.
  * Enhance DenseMatrix::evd() interface to also compute left and right eigenvalues.
  * Add MPI_Scatter wrappers to Parallel:: interface.
  * Add --enable-petsc-required configure option.
  * Add extensive unit tests of various FE/Elem combinations.
  * Fix caching bugs in FEXYZ and CLOUGH element types.
  * Fix bugs and add unit tests of reading unique ids.
  * Use PetscViewerPushFormat in PetscMatrix and PetscVector.
  * Miscellaneous --enable-single (single precision) bug fixes.
  * Keep boundary IDs consistent on DistributedMesh.
  * Avoid writing trailing whitespace to XDA files.
  * Add --enable-cxx11-required configure option.
  * Add all_first_order option to meshtool.
  * Optimize stitch_meshes() algorithm by avoiding unnecessary PointLocator calls.
  * Add configure test for std::make_unique() and libmesh_make_unique() workaround.
  * Add MeshBase::active_semilocal_elements_begin()/end() accessors.
  * Handle NULL elements in EquationSystems::get_solution().
  * Fix const-correctness issues in Elem interface, deprecate old interfaces.
  * Add configure test of C++11 noexcept.
  * Remove object-oriented C from misc_ex7.
  * Restrict several examples to only run with specific linear solver packages.
  * Slight optimizations to Tri6, Hex8::volume().
  * Add optimized specialization of Elem::contains_point() for Tet4.
  * Add TypeTensor::solve() and replace inverse/multiply in a few places.
  * Add unit test for FParser automatic differentiation optimization.
  * Don't use WRITE_PARALLEL_FILES for Xdr files unless requested.
  * Update systems_of_equations_ex8 to use EDGE2 elements for connecting contact nodes.
  * Add unit tests for EulerSolver, Euler2Solver, and NewmarkSolver.
  * Don't assume interior_parents() are always part of the same Mesh.
  * Add vectormap::find() const and non-const versions.
  * Avoid repeatedly destroying/creating vector in compute_affine_map().
  * Add reinit_func() to NewmarkSolver, setters for beta, gamma.
  * Better documentation for FEMContext::<elem,side,edge>_reinit.
  * Call connect_children() in MeshCommunication.
  * Use write_discontinuous_exodusII() to plot stress in systems_of_equations_ex6.
  * FEInterface::map() now handles infinite elements.
  * Replace a few remaining deprecated uses of TypeVector::size() with norm().
  * Only call ex_update() on Exodus files that are open for writing.
  * Fix logic bug in ParameterVector::clear().
  * Add DofMap::gather_constraints() helper function, use in allgather_constraints().
  * Fix for writing NodeElems in ExodusII_IO_Helper::write_elements().
  * Add ability to set user-defined flags when calling TetgenMeshInterface functions.
  * Move ReplicatedMesh->replicated_mesh.h, DistributedMesh->distributed_mesh.h

0.9.5 -> 1.0.0
  * Add parallel I/O for Nemesis format, solution vector is no longer broadcast.
  * Elem: add node_ref(), node_ptr(), node_id().
  * Mesh: add node_ref(), elem_ref(), elem_ptr().
  * Deprecate DivaIO, Xdr{MESH,MGF,SOLN,MHEAD,SHEAD,HEAD}, LegacyXdrIO classes.
  * Improve HDF5 configure tests, link against -lhdf5_cpp when available.
  * Use PETSc's METIS, if available and PETSc is enabled.
  * Add RAII-based performance logging macro, LOG_SCOPE.
  * VTKIO is a "parallel" I/O format, it is now marked as such.
  * Optimize FEMap calculations, standardize get_foo() usage.
  * Configure with --enable-unique-ptr by default.
  * CondensedEigenSystem: condense out constrained dofs to avoid spurious eigenvalues.
  * Add OrderWrapper shim class, we are no longer limited by Order enum.
  * Free communicators created by a split().
  * Add --with-thread-model configure flag, split threads.h into separate files.
  * Make adaptivity_ex3 use HIERARCHIC elements by default, test p and hp refinement.
  * hp-adaptivity/coarsening fixes for ParallelMesh.
  * Fixes for infinite elements in misc_ex1, ExodusII_IO.
  * Add C++03/11 appropriate locking to PetscVector::_get_array().
  * FEMContext: Don't increment hardest_fe_type order for SCALARs.
  * Add SPARSELU SolverType for Eigen.
  * Add misc_ex12 demonstrating the MITC4 element.
  * Bugfix for DofMap::constrain_element_matrix().
  * Add Type{Vector,Tensor}::norm(), norm_sq() replacing size(), size_sq().
  * Allow KSP tolerances to be set from the command line.
  * Remove PETSc < 2.3.3 code paths.
  * Add triple_product(a,b,c) for TypeVectors.
  * Fix EIM truth_solve on hybrid meshes.
  * Optimize EIM by storing inner_product * basis functions
  * Add method to plot EIM parameterized functions.
  * Add notion of time-dependence to FunctionBase.
  * Replace NULL usage with backwards-compatible libmesh_nullptr.
  * Optimized memory usage in EIM construction.
  * Add optimized Elem::volume() implementations for all Elem types.
  * Refactor EnsightIO object to use C++ I/O and string handling.
  * Mulitple re-optimizations of new GenericProjector codepath.
  * Mark various leaf classes as "libmesh_final".
  * Redesign Parallel packed_range functions.
  * Add GMRES support to EigenSparseLinearSolver.
  * MeshBase::spatial_dimension() is no longer simply LIBMESH_DIM.
  * Add unit test of refining a slit mesh.
  * NewmarkSolver: fix cache w/o restore bug.
  * Fix dimension==0 issue in MeshTools::Generation::build_sphere() after clearing mesh.
  * Add EigenSparseMatrix::l1_norm(), linfty_norm().
  * Fix memory leak in vector_fe_ex{2,3,4}.
  * Generalize build_cube() Gauss-Lobatto grid using redistribute().
  * PointLocatorList class deprecated.
  * Set preprocessor tokens when PETSc has SuperLU_dist and/or MUMPS support.
  * Make System::calculate_norm() work on mixed-dimension meshes.
  * Add support for writing NodeElems in Exodus using "SPHERE" elements.
  * MeshTools::Modification::all_tri() generalized to work with Prisms, Hexes.
  * Use unique_ids to disambiguate Hilbert orderings with overlapping nodes.
  * Fixes for unique_ids with ParallelMesh.
  * Unify spacing around pointer/reference declarations, establish coding convention.
  * Many configure tests added for C++11 features.  Test regardless of --enable/--disable-cxx11.
  * Fix for writing Exodus files with non-contiguous node numberings.
  * Add BounaryInfo::remove_id().
  * Fix misc. Doxygen warnings, simplify examples documentation generation.
  * Misc. updates/fixes to FParser AD and JIT capabilities.
  * Check for consistency between libMesh and PETSc scalar and index types.
  * Add DenseMatrix::svd_solve().
  * Fix DenseMatrix::svd(sigma, U, VT) in rectangular case.
  * Refactor Elem::side() functions to use existing "sides_node_map" arrays.
  * Add Elem::key() interface, consistent with Elem::key(side) on lower-dimensional elements.
  * PETSc/TAO interface updates for PETSc 3.7.0.
  * Detect and workaround TRI3 numbering inconsistency in Cubit 14 and 15.
  * Update bundled automake from 1.12.5 -> 1.15.
  * Update bundled libtool from 2.4.2 -> 2.4.6.
  * Make header/forward declaration fixes suggested by cppclean.
  * Deprecate BoundaryInfo::add_{side,node,edge}() which returned result by value.
  * Replace deprecated BoundaryInfo functions with versions taking a vector by reference.
  * Refactor/update the UCDIO class.

0.9.4 -> 0.9.5
  * Add interface to SLEPc's solver for generalized indefinite Hermitian eigenvalue problems (GHIEP).
  * Refactor NumericVector::insert(), add PetscVector<T>::insert() specializations.
  * Refactor NumericVector::add_vector().
  * Add DiffContext::elem_solution_rate.
  * Add systems_of_equations_ex7, solves large deformation elasticity.
  * Add hand-coded TypeTensor<T>::inverse().
  * Add static Elem::invalid_subdomain_id value.
  * Bugfix in PatchRecoveryErrorEstimator.
  * Miscellaneous improvements to FParser/FPOptimizer/JIT/AD code.
  * Add/enhance unit tests for many classes.
  * Add Elem::build(NODEELEM).
  * Add CompositeFunction and CompositeFEMFunction.
  * Add NameBasedIO, refactor UnstructuredMesh::read().
  * Add 2D Grundmann-Moller quadrature rules for triangles.
  * Improve OpenMP configure test.
  * Return "invalid" ids from MeshBase::get_id_by_name(), BoundaryInfo::get_id_by_name() rather than erroring.
  * Generalize the concept of "dimension" in Mesh with elem_dimensions std::set.
  * Add the ParameterAccessor, ParameterMultiPointer class hierarchies.
  * Fix bug in adjoints_ex3.
  * Allow custom gdb command, enabling/disabling of gdb backtraces.
  * Add mixed dimension mesh support to PointLocator.
  * Add post-init() EquationSystems::add_system().
  * Fix PointLocator bug in 2D case where elements aren't in x-y plane.
  * Update AutoPtr to UniquePtr, add build support for Howard Hinnant's C++03 unique_ptr implementation.
  * Miscellaneous bugfixes to support configuring with --with-dof-id-bytes=8.
  * Add TopologyMap class, use to look up new nodes during refinement.
  * Merge METIS/ParMETIS upstream patches from PETSc repo.
  * Make METIS IDXTYPEWIDTH and REALTYPEWIDTH match dof_id_type and Real, respectively.
  * Add MeshBase::{bnd,bid}_nodes_{begin,end}.
  * Add systems_of_equations_ex8, solves linear elasticity with contact.
  * Add GenericProjector, use to refactor FEM projection code.
  * Add support for linking against VTK 6.2+.
  * Add ErrorEstimatorType enum.
  * Correctly compute second derivatives on non-affine elements.
  * Tetgen is no longer enabled unless libmesh is configured with --disable-strict-lgpl.
  * Miscellaneous bugfixes in RBEIMConstruction.
  * Adding Optimization{Solver,System} classes, examples with nlopt and TAO instantiations.
  * Add configure test for dlopen() and friends.
  * Add embedding matrix for Prism15.
  * Add EigenSparseLinearSolver::get_converged_reason().
  * Add support for 1D elements in MeshTools::find_nodal_neighbors().
  * Replace uses of "echo -n" in shell scripts with printf.
  * Add support for PETSc 3.6.x release series.
  * Use common FEMParameters in adjoints examples.
  * Add support (and bugfixes) for mixed dimension refinement.
  * Add NewmarkSolver support for FEMSystem-based codes.
  * Add support for sparse CouplingMatrix.  Improves performance in many-sparsely-coupled-variables problems.
  * Add {First,Second}OrderUnsteadySolver for FEMSystem-based codes.
  * Support reading boundary conditions and lower-dimensional elements in Gmsh files.
  * Refactoring/bugfixes in misc_ex3, use object-oriented NonlinearImplicitSystem interface.
  * Upgrade Eigen distributed with libmesh to version 3.2.5.
  * Add Cap'n Proto serialization support in reduced basis code and examples.
  * Multiple bugfixes for the --enable-complex configuration.
  * Miscellaneous bugfixes for single precision and long double precision builds.
  * Detect version 3.6.0+ in SLEPc configure test.
  * Add support for debug-enabled PETSc builds -- Vec{Get,Restore}ArrayRead(), fix redundant close() calls, etc.
  * Parallel mesh repartitioning bugfixes/enhancements.
  * Miscellaneous improvements to trilinos.m4, set more #defines for the parts of Trilinos which are available.
  * Bugfixes for non-blocking send/receive requiring persistent buffers.
  * Add support for user-defined subdomain id assignment in MeshExtrusion.
  * Add MeshBase::ghost_elements_{begin,end} iterators.
  * Add SolverConfiguration class to generalize the setting of complicated solver parameters.
  * Add PetscSolverException, change LIBMESH_CHKERRABORT -> LIBMESH_CHKERR to throw exceptions rather than aborting.
  * Miscellaneous improvements/bugfixes to Parsed*Function classes.
  * Miscellaneous bugfixes in Trilinos support code, better include guards.
  * Use C++11 "override" feature via libmesh_override where appropriate.
  * Remove outdated QuadratureRules and ElementTypes functionality.
  * Support "if (!foo)" for AutoPtr using safe_bool<T> utility function.

0.9.3 -> 0.9.4
  * Pyramid13 elements
  * Subdivision surfaces
  * Support for PETSc fieldsplits
  * Point loads in reduced basis problems
  * Improved AdjointRefinementErrorEstimator indicator quality
  * Discontinous plotting can be done with subsets of EquationSystems
  * complex-valued and single-precision ExodusII/Nemesis output
  * allow appending to Tecplot ASCII files
  * improved Abaqus, Gmsh, UNV I/O support
  * VTK 6 support
  * QHull now distributed in contrib/
  * Several Fparser enhancements by @dschwen
    * Automatic differentiation
    * Allow NaN in fparser parsed functions
    * Fparser JIT support
    * Many fpoptimizer bugfixes
    * plog (polynomial log approximation) function added
  * Support NaN to locally disable DirichletBoundary functions
  * Methods for nonlocal computations with SCALARs in FEMSystem
  * PointLocator option for local element searches
  * PointLocator/MeshFunction option for searches close to elements
  * Better solver convergence reporting
  * Better 16-bit and 64-bit hash functions
  * Better QGrid behavior, documentation
  * DenseMatrix eigenvalue computations
  * DenseMatrix operations with mixed scalar types
  * Mesh stitching can now be done using node and edge boundary IDs
  * Variational mesh smoother refactoring
  * MeshModification::transform() with arbitrary warping functions
  * Use MPI_THREAD_FUNNELED when available
  * libmesh_cast_ptr/ref/int deprecated, replaced by cast_ptr/ref/int
  * libMeshEnums namespace removed; enumerations in libMesh namespace
  * Configure tests for more C++11 features
  * Default complation with -std=c++11, easier for users to disable
  * Better configure autodetection of slepc, eigen compatibility
  * configure options for software licensing
    * non-LGPL-compatible options disabled by default
    * libHilbert now under LGPL
  * clearer "configure --help" output
  * more verbose error messages using libmesh_error_msg()
  * reformatted source code, no tabs should be in code from now on
  * Assorted bug fixes, optimizations, new regression tests
    * all_first_order() and build_extrusion() bugs fixed
    * fixed libHilbert interface regression
      * some xda/xdr files created with 0.9.3 MAY BE CORRUPTED when
        read with older/newer libMesh versions, and vice-versa!
    * fixed bug with stitching "slivers"
    * fixed std::memset bug which pops up for newer GCCs on OSX
    * fixed misc. distcheck bugs
  * Many fixes to silence paranoid compiler warnings (see doc/notes/compiler_warnings.txt)
  * Use -f when symbolic linking files during build/install stage
  * 1D Gauss-Lobatto quadrature rules, additional quadrature unit testing
  * Cut-cell quadrature (ElemCutter, QComposite classes) for XFEM
  * Per-subdomain scalar variable support
  * Added 'meshavg' application for averaging solutions
  * GDB backtraces and backtraces from the segfault handler
  * Support -fsanitize=address flags on newer Clang and GCC compilers
  * http://libmesh.github.io created, http://libmesh.sf.net is gone/permanently blocked
  * "make doc" target completely overhauled
  * Protect Mesh::BoundaryInfo behind an accessor.
  * NumericVector::add_vector(), ::get(), ::insert() refactoring.

0.9.2 -> 0.9.3
  * FEMContext public members now private, must use API pushed in 0.9.2.
    Breaks backward compatibility of FEMContext.
  * Intel 14.0 Compatibility.
  * Streamlined checkpoint/restart capability for ephemeral usage.
  * new --disable-warnings option.
  * Added heterogeneous Dirichlet adjoint constraints.
  * Added edge Dirichlet constraints.
  * Improved support for non-32-bit IDs.
  * PETSc 3.5 support.
  * OSX 10.9 XDR compatibility.
  * Memory optimizations for Metis/Parmetis partitioning auxiliary
    data structures.
  * HEX20, PRISM15, PYRAMID5, PYRAMID14 shape functions.
  * Nedelec elements.
  * Upgraded bundled Boost to v1.55.
  * Expanded ExodusII API.
  * Additional enum/string conversion utility functions.
  * Assorted bugfixes:
    * for SzaBab and Bernstein h-adaptivity.
    * for p-adaptivity.
  * global_n_processors()/global_processor_id() functions to access
    MPI rank information from the original communicator used to
    initialize the library
  * Fixed longstanding bug that could arise for mixed finite element
    types with ParallelMesh on specific partitionings

0.9.1 -> 0.9.2
  * PETSc 3.4 support
  * PETSc BAIJ matrix support for blocked matrices
    * opt-in for this with './configure --enable-blocked-storage ...'
    * may cause issues with preallocation in Reduced Basis code -
      see http://sourceforge.net/mailarchive/forum.php?thread_name=B4613A7D-0033-43C7-A9DF-5A801217A097%40nasa.gov&forum_name=libmesh-devel
  * Refreshed packaged METIS and ParMETIS to latest versions
  * Experimental support for DGFEMContext
  * New accessor API for FEMContext objects. Public members deprecated.
  * Assorted bugfixes:
    * for nonstandard index sizes

0.9.0 -> 0.9.1
  * Multi-communicator-capable objects
    * Communicator-using ParallelObject subclasses can be initialized
      with arbitrary MPI communicators, independent of the
      communicator used to init libMesh or the communicators used by
      other non-interacting objects
    * No internal library code still uses CommWorld communicators
    * CommWorld and global Parallel:: methods can be disabled via
      configure --disable-default-comm-world, breaking backwards
      compatibility, to facilitate compile-time checking of
      libMesh-based codes for compatibility with multi-communicator
      usage.
      * These methods will be disabled by default in future versions,
	but configure --enable-default-comm-world will work for the
        next few releases
  * Additional specializations for Parallel:: communication methods
  * New SolutionTransfer infrastructure, implementations, examples
  * Singleton framework added
  * Complex-valued libMesh builds can new read real-valued restarts
  * Interface to and contrib copy of Eigen linear algebra package
  * Interface to and contrib copy of newer Nemesis/ExodusII/NetCDF
  * build Tecplot binary I/O library from source,
    * old behavior can be restored via --disable-tecio --enable-tecplot
  * Assorted bugfixes:
    * UnsteadySolver is now more robust inside AMR loops
    * Preconditioner setup is more robust with AMR
    * Fixes in Trilinos and SLEPc package interfaces
    * Fix for multithreaded QoI derivative assembly
    * Fixes for compiler and 3rd party library compatibility
  * Clarifications, updates to API documentation


0.8.0 -> 0.9.0
  * automake build system
    libMesh-specific implementation features:
    source and header files must be listed explicitly.
    When adding a header file,
      1.) svn add the file
      2.) cd include ; ./rebuild_include_HEADERS.sh
      3.) cd include/libmesh ; ./rebuild_makefile.sh
    When adding a soure file,
      1.) svn add the file
      2.) cd src ; ./rebuild_libmesh_la_SOURCES.sh
    General notes:
      o make install && make installcheck
        installs the built library & performs sanity checking
      o make distcheck
        packages up a tarball and tests it for self-sufficiency.
	always do this when modifying the build system.
      o for more information, view the README and INSTALL files.
  * VariableGroups DofObject storage optimization for the common
    case of multiple Variables of the same type within a System.
    Note this changes the default variable ordering within a
    System - the old format is available via System::identify_variable_groups()
  * TecplotIO binary format updated to support v11.2 features where
    available.  This includes encoding the solution time into output files,
    writing each libMesh subdomain to a separate Tecplot zone, and support
    for 1D Tecplot binary files.
  * ./configure'able support for identifier types. Defaults:
         id size (boundaries)............. : 2 bytes
         id size (dofs)................... : 4 bytes
         id size (processors)............. : 2 bytes
         id size (subdomains)............. : 2 bytes
  * Reduced memory footprint for Node objects.
  * Fix for using specified preconditioners with adaptivity and PETSc-3.3.
  * New Examples:
     o fem_system_ex2: Nonlinear elasticity, courtesy Robert Weidlich.
     o adjoints_ex5: Unsteady Adjoints.
     o miscellaneous_ex8: meshfree, inverse distance interpolation.


0.7.3 -> 0.8.0
  * Vector-valued finite elements & related examples
  * Entirely refactored Parallel namespace implementation
  * Properly communicate DofIndices when communicating DofObjects
  * std::thread-like asynchronous function execution
  * Refactored serialized EquationSystems I/O for increased performance
  * Heterogeneous constraints & bug fixes
  * Proper DirichletConstraints Dirichlet boundary conditions
  * Improved PeriodicBoundary support
  * Refactored, parallelized SparsityPattern generation
  * Weighted Patch Recovery Error Estimator suppport
  * Relocated header files, e.g.
      #include "dof_map.h" becomes
      #include "libmesh/dof_map.h"
    this will be strictly enforced in the next release.
  * ParallelMesh fixes
  * PGI, Sun Studio compiler portability fixes
  * MeshTools::Generation::build_sphere() icosahedron support
  * Improved Abaqus reader support
  * Improved UCDIO writer support
  * Output only a subset of variables from EquationSystems
  * Run-time floating point exception trapping via --enable-fpe
  * Refreshed packaged METIS and ParMETIS to latest versions
  * PETSc-3.3, SLEPc 3.3 support
  * Trilinos-11 support
  * Mac OSX 10.8 "Mountain Lion" fixes
  * New Examples:
     o systems_of_equations 4, 5, 6: 2D and 3D linear elasticity
     o reduced_basis_ex5: 3D linear elasticity with the Reduced Basis method
     o reduced_basis_ex6: Empirical interpolation method for a geometrically parametrized domain in 3D
     o reduced_basis_ex7: Complex-valued Reduced Basis problem modeling an acoustic horn


0.7.2 -> 0.7.3
  * Templated FunctionBase and subclass functors
  * Functor-based versions of more system APIs
  * Integrated function parser based functor
  * More flexible PetscMatrix responds to -mat_type
  * Elem::close_to_point() method for contact problems
  * Heterogenous constraint equation support
  * Dirichlet constraint equation support
  * More methods are ParallelMesh-compatible
  * Mesh extrusion generation
  * UniformRefinement error estimates for more adjoint options
  * Element truth table written in ExodusII output
  * GetPot detection of overridden variables
  * Reorganized examples by category
  * C++11 compatibility fixes
  * Many assorted bug fixes

0.7.1 -> 0.7.2
  * Discontinuous hierarchic FE basis
  * PatchRecoveryErrorEstimator patch reuse option
  * New partitioning-aware Patch construction option
  * More efficient adjoint solves with PETSc
  * New projection example utility
  * Bare System objects are now useful for efficient utilities
  * Many Exodus/Nemesis output improvements
  * BoundaryInfo::sync() is now AMR- and ParallelMesh-compatible
  * More code is now ParallelMesh-compatible
  * More flexible Parallel:: APIs
  * Elem:: utilities for semi-structured grids
  * NodeConstraints calculations for moving mesh users
  * Stack trace output on any uncaught exception
  * Corrected non-standard C++ in FE class specializations
  * Multithreaded FEMSystem assembly functions
  * Assorted efficiency improvements
  * Various Trilinos, Tetgen, Triangle interface improvements
  * Compatibility with newer third-party packages, compilers
  * Read support for ABAQUS meshes
  * Many assorted bug fixes

0.7.0 -> 0.7.1
  * Periodic boundary support enhancements
  * New example with subdomain-restricted variables
  * New examples with adjoint-based adaptivity, sensitivities
  * More flexible multiphysics AdjointResidualErrorEstimator norms
  * PatchRecoveryErrorEstimator of directional derivative seminorms
  * Improved VTK output
  * Separate RBEvaluation class for online Reduced Basis solves
  * Object-based assembly API options
  * Partitioning can now use element weights
  * Better support for boundaries with multiple BC IDs
  * More matrix printing options
  * XZ compression support
  * Subset solves with PETSc
  * Better SLEPc compatibility
  * Properly read restart files with a subset of our variables
  * New utility for comparing restart files
  * Easier enabling of float, long double configurations
  * Most features now work with RTTI disabled
  * Many assorted bug fixes

0.6.4 -> 0.7.0
  * Certified Reduced Basis model creation/evaluation
  * Adjoint-based sensitivity calculations and error indicators
  * Support for newer PETSc, SLEPc
  * More autodetection of optional dependencies
  * New examples:
  ** Discontinuous Galerkin
  ** SCALAR Lagrange multipliers
  ** Certified Reduced Basis method
  * Parallel:: utilities for std::set data
  * Parallel:: support for non-default MPI communicators
  * Parallel:: support for non-magic-number message tags
  * GMVIO support for subdomain material ids
  * ExodusII support for writing discontinuous data
  * Switched some example output formats to Exodus, now that GMV is going away
  * More ASCII IO support for variable precision
  * FEMContext utilities are now useable outside FEMSystem
  * Optional BLAS-based dense linear algebra operations
  * Improved fork of GetPot input parsing
  * Support for interior boundary ids
  * Elem::find_edge_neighbors utility
  * Additional patch recovery error estimation norm options
  * Additional SystemNorm functionality
  * Support for zero-dimensional "meshes"
  * Support mesh construction without pre-specified dimensionality
  * Optional independent redirection of libMesh output/error text streams
  * Moved libMesh classes into libMesh namespace
  * More forward declarations, refactoring to reduce header dependencies
  * Fix for an infrequent-but-major I/O-corrupting bug in our libHilbert interface
  * Fix for errors when doing adaptive refinement across a periodic boundary
  * Fix for projections on systems with per-subdomain variables
  * Many fixes for minor bugs, overzealous assertions