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

A lot of things have been documented and other things still need to investigated or tested.
Various patches are mentioned that stil need to be submitted.
Changed section marking
Added Maintainer header
Renamed f-building-win.rst to f-windows.rst
Changed Linux to GNU/Linux
Merge branch 'build-win-doc' of https://github.com/ffes/ctags into ffes-build-win-doc
Merge branch 'ffes-build-win-doc'
add f-windows.rst to the hacking guide

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
Added subsction: "Other differences between Microsoft Windows and GNU/Linux"