This is the first version of f-building-win.

Disclaimer: I know I have push rights, but I want you to be able to comment on this before I push it.

This is the first version of f-building-win. A lot of things have been documented, but there are things that need to discussed. Like:
- Do we provide project files for IDEs? I have (and use) them for VS2013 and Code::Blocks
- Do we suggest a preferred build environment for Windows when compiling with GCC?

Can anyone with knowledge of autoconf fix the problem described in this document? That is: add regex and fnmatch when building for Windows. Or should I add a separate issue for this.

It contains a number of references to patches that I have to submit as pull requests or push directly. They will follow any time soon.

Important patches:
- patch for general.h to fix mingw-w64 compilation
- patch for mk_mvc.mak to add fnmatch()

Less important patches:
- patch to mk_mingw.mak to generate separate object files
- patch to mk_mingw.mak to optimize the non-debug build
- patch to mk_mvc.mak to clarify the build steps