Add visual studio 2013 support

Thanks for your contribution!

I spent a few hours to add visual studio 2013 files, fix c2039 errer which caused by missing include in visual studio 2013, and tested all projects in visual studio 2013 (12.0.30501.00 Update 2), they all built successfully!

The successfully built targets contain: ad, git_id, Recast, Detour, MoveMapGen, vmap_assembler, libmpq, vmapExtractor, bzip2, framework, g3dlite, game, genrevision, script, shared, ACE, tbb, tbbmalloc, zlib, realmd, mangosd..

Thank you!