Make naming consistent with our marketing of ex-rail for files and defines
* Rename RMFT.h to EXRAIL.h
* Rename RMFT2.cpp to EXRAIL2.cpp
* Rename RMFT2.h to EXRAIL2.h
* Rename RMFT2MacroReset.h to EXRAIL2MacroReset.h
* Rename RMFTMacros.h to EXRAILMacros.h
* Rename RMFT references to EXRAIL