Makes the following changes to the FRED project for MSVC2013:
-Set WINVER and _WIN32_WINNT to 0x501

In combination with this download: http://go.microsoft.com/?linkid=9832071 this will enable FRED building on that compiler.


git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9976 387891d4-d844-0410-90c0-e4c51a9137d3