Added the Test projects to the Build script
Merge remote-tracking branch 'upstream/develop' into develop
Fixed case on failonerror flags
Update default.build

Fixed the location of the Test Solution and removed the failonerror attribute.
Fixed Guide initialization exception when Guide is called on WP8 from non-UI thread
Re-added missing if WINRT directive
Merge pull request #1616 from azchohfi/develop

Added MGSpriteFontTextureProcessor content processor.
Merge pull request #1595 from dellis1972/develop

Added Tests to default.build script
Merge pull request #1629 from Nezz/wp8_guidethreadfix

Fixed Guide exception on WP8