Improve signature change detection to trigger ware configure

[Arthoni]

Currently done through DevStudio edit dialog checkbox, should be internal to build process

Should be done in CMake, by using set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${_META_PATH})

But underlying problem of configure from build that does not recognize macro OPENFLUID_ADD_WAREPLUGIN

Potentially related with OpenFLUID_DIR that would be wrong at configure or build step (pointing to non-existing dir)

Appendix

CMakeLists.txt of a ware to investigate OpenFLUID_DIR, check with and without CACHE var

set(OpenFLUID_DIR "${OpenFLUID_DIR}" CACHE PATH "Path to FOO_DIR")
MESSAGE(STATUS "OpenFLUID_DIR: ${OpenFLUID_DIR}")
#INCLUDE("${OpenFLUID_DIR}/../openfluid/cmake/OpenFLUIDHelpers.cmake")
INCLUDE("${OpenFLUID_DIR}/OpenFLUIDHelpers.cmake")