Added Part 7 Tutorial Link to Microsoft Tutorials.

This tutorial was not authored by a Microsoft resource and is not sanctioned by Microsoft. However, because the tutorial is a progression of the existing tutorials (dead for two years) I have decided to place it with the others.
Merge pull request #3281 from cclements1384/AddTutorialLinks

Added Part 7 Tutorial Link to Microsoft Tutorials.
ni puta idea
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