OS X: Update the metadata plug-in to be slightly faster

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90899 e17a0e51-4ae3-4d35-97c3-1a29b211df97
OS X: consolidate the Xcode configs into the Xcode project itself.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90900 e17a0e51-4ae3-4d35-97c3-1a29b211df97
OS X: more trimming of the metadata plug-in.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@90902 e17a0e51-4ae3-4d35-97c3-1a29b211df97