Windows builds not possible using current Makefile.win32

[ventti]

Cross-building of Cheesecutter using current Makefile.win32 is not possible in present-day environments.

So far I've not been able to find a solution for DMD and Clang compilers either, although that is not an indication for being impossible.

Proposal for actions

• co-op and derive a working solution for (cross-)building CheeseCutter to win32 and/or win64 target(s)
• update Makefile.win32 accordingly, add Makefile.win64 if needed
• preserve a working build environment e.g. in a Docker container