• for CMake >= 3.15, enforce CMP0094 which greatly improves Python finding
• allow MS-MPI to work, useful for MSYS2 Gfortran.
• only directly reference MPI module in the mpimod.f90 (and some unit tests)

Now there are four ways to run Gemini on Windows:

• Cygwin
• WSL
• Intel
• MSYS2