Updated for released version of VS2013. Note that FRED building is currently not supported on this platform due to MS deprecating Multibyte Charset for MFC, and haven't provided a workaround at this time.

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9967 387891d4-d844-0410-90c0-e4c51a9137d3