- spec file for pyinstaller detects architecture (32 or 64bit)
- spec file uses os.path.join
- spec file creates and adds the list of messagetypes
- added MinGW/MSyS support in Makefile
- separate Makefile.msvc for MCVC
- bitmsghash.cpp minor adjustments to build also on MSVC/MinGW
- if frozen mode, messagetypes loads the list of files from a text file
generated during archive building rather than from a directory
