Third stable release

This will be the last release based on Numerical Recipes. All future versions will use purely open source algorithms.

• New implementation of particle sources with much more flexible particle-dependent options (note new options in geometry.in and particle.in)
• Added spin flips on reflection of UCN from walls (note new material properties in geometry.in)
• More robust geometry collision detection using CGAL library.
• More flexible logging with separate output files for each particle type, including new ROOT script merge_all.c to read all output files into one ROOT tree
• Numerical Recipes-independent code moved into separate compilation units

Known bugs: #18, #19, #23

Second stable release

Second stable release.
Changes since v1:

• removed last remainders of cylindrical coordinates, note the new in-
  and output file formatting!
• new random number generator with full 64bit resolution
• new flexible class concept for fields and more modular code
• lots of bugfixes and optimizations

Known bugs: #1, #7, #10, #23

First public release

It is mostly based on code that has been heavily used. However, the new possibility of UCN transmission through matter has not been fully tested.
Known bugs: #1, #7, #10, #23