Add private feature to several functions of CExpRKMethod
	modified:   copasi/trajectory/CExpRKMethod.h
Fix bugs for hybrid method in CExpRKMethod.cpp
	modified:   copasi/trajectory/CExpRKMethod.cpp
	modified:   copasi/trajectory/CHybridMethodODE45.cpp
Fix small bugs in CExpRKMethod for hybrid method
	modified:   copasi/trajectory/CExpRKMethod.cpp
	modified:   copasi/trajectory/CHybridMethodODE45.cpp
remove print commands
	modified:   copasi/trajectory/CHybridMethodODE45.cpp
Added some basic classes for UNDO framework and made some changes on
methods of some COPASI classes to enable its integration.
Merge branch 'master' of https://josephdada@github.com/copasi/COPASI.private.git
- copasi.h: ensure that windows defines do not change what numerical_limits::max means
- CMakeLists.txt: add undo to moc flags
- CQReactionDM: function needs to return a value
- ReactionDataChangeCommand: need to ensure, that there is a reaction for the given index