Update README.md
Update README.md
HT_WITH_SYSTEMDIR is finally a PATH option! :D
I finally found some mingw64 libs for SDL
Toolchain files for cross-compiling for Windows (mingw64)
Removing old soft-oal files
openal-soft 1.15.1 binaries and headers for mingw-w64
OGG/Vorbis support on Windows!

Although x64 executable crashes, it has no relationship with the fact
that OGG/Vorbis compiles and links with it, on x86 is working like a
charm
Merge branch 'cross-mingw64' of github.com:alericoveri/hecatomb into cross-mingw64