Building on Windows

1. Install CSFML and SFML.
2. Copy C:\MinGW\bin\mingw32-make.exe to C:\MinGW\bin\make.exe. This fixes CMake Error: CMake was unable to find a build program corresponding to "Unix Makefiles". CMAKE_MAKE_PROGRAM is not set
3. Make sure to install mingw or mingw-w64 if you want to compile with 64 bits. See the gcc-rs opinion. And make sure the right gcc and g++ are the first on your path. This avoids miniz.c:1:0: sorry, unimplemented: 64-bit mode not compiled in ...