Added the Test projects to the Build script
Merge remote-tracking branch 'upstream/develop' into develop
Fixed case on failonerror flags
Initial check in of Core "Split" Project

* Windows Project implementation only
* Added PCL Targets Foder with PCL target libs and instructions
* All files unchanged except for:
  -  additional #if statements for core project
  -  patch to Content/ContentTypeReaderManager.cs to allow for core type resolution
* Single solution files for Windows VS and Xamarin Studio
Merge branch 'developcore' of https://github.com/DDReaper/MonoGame into developcore
Merge branch 'develop' of https://github.com/mono/MonoGame into developcore
Reverting files back to develop originals
Added MGSpriteFontTextureProcessor.

This allows MG to compile images to SpriteFonts, using the params like
in XNA. This was just an adaption from the MGSpriteFontProcessor, so the
problems that MGSpriteFontProcessor has, MGSpriteFontTextureProcessor
will also have.
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Merge branch 'develop' of https://github.com/mono/MonoGame into developcore
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
Merge branch 'develop' of https://github.com/mono/MonoGame into developcore
Merge branch 'developcore' into developportable