Update mupen core from hg
Merge pull request #472 from kjg/new_mupen_core

Update Mupen64Plus core with latest from hg
Change OpenEmu_Prefix.pch so that .c/.cpp files don't throw parse issues
Improves popout gameplay window’s full-screen transition animations. Fixes #436.
Tests current class in +initialize.
Positions the HUD controls bar above or below the HUD window if the controls bar width is greater than the game view width. Fixes #437.