Guide.ShowKeyboardInput for WinRT

I've implemented the Guide.ShowKeyboardInput for WinRT. It uses a XAML
to draw a PopUp with an InputBox (or PasswordBox) and two buttons, one
for OK and other for Cancel. It is similar to the MessageDialog.
Merge branch 'develop' of https://github.com/mono/MonoGame into winrtGuideShowKeyboardInput
Now compiling again on WP8 branch.
Some fixes to PSM rendering

Added TexCoord to BasicEffect shaders
Removed default BlendState for BasicEffect pass
Renamed reserved word Texture effect parameter in BasicEffect
Look for EXACT vertex buffer match (vertex and index array sizes must match request)
Fixed the slowdowns that occur when debugging WP8 and dragging the screen
Fix for Android memory leak and random null ref exception.
https://github.com/mono/MonoGame/issues/1685
Updated NuGet packages for 3rd December 2013
New NuGet packages published from code version as of this date

Only known issue, Win GL project still referencing SharpDX Raw Input

NuGet releases now 3.1.1-Alpha
Added NuSpec for the Content Processor aligned to 3rd December release
Repackaged 3rd December release. Odd dll issue for Store builds.

*Note found an 8.1 bug which needs resolving with the package.
Will also refresh for a more recent release with this fix
Updated for December 10 cut.
Resolved Windows 8 build issue
Windows 8.1 package updated to be fully functional
Merge branch 'develop' of https://github.com/mono/MonoGame into develop

Conflicts:
	MonoGame.NuGetPackager/Package.Binaries.nuspec
	MonoGame.NuGetPackager/Package.ContentProcesors.nuspec
	MonoGame.NuGetPackager/Package.nuspec

Merged.
Fixes.
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 winrtGuideShowKeyboardInput

Conflicts:
	MonoGame.Framework/MonoGame.Framework.Windows8.csproj
	MonoGame.Framework/Windows/GamerServices/Guide.cs

Merged with new Protobuild process.
Fixes RenderTarget2D OpenGL DeleteRenderbuffers when is DepthFormat.None
Merge remote-tracking branch 'origin/winrtGuideShowKeyboardInput' into toRelease