* Small fix to be able to use XNA XNBs without having to "manually edit" them as stated in http://chainedchaos31.tumblr.com/post/97557910457/playing-audio-on-the-playstation-vita-via-monogame
* Applied fixes described in http://community.monogame.net/t/spritebatch-cs-effect-cs-this-does-not-appear-to-be-a-monogame-mgfx-file/1070/2
reworked Effect.cs commit
Merge pull request #3283 from KakCAT/psmobile_small_fixes_take3

Psmobile small fixes