Add GME to MSVC 10 solution

MSVC builds did not have GME enabled, so I fixed that up real quick.

This flips on HAVE_LIBGME and HAVE_ZLIB for SRB2WIN and SRB2DD. It compiles and works fine on Visual Studio 2015 (target platform 8.1)

r_opengl.dll

fmodexL.dll

Srb2DD-gme.exe

Srb2Win-gme.exe

test_music.wad (tunes gme01)