Added [Toolkit.Audio] and desktop example.
[Toolkit.Audio]  Added SoundEffect.FromFile and example.
[Toolkit.Audio]  Started implenting WaveBank
[Toolkit.Audio] Ported WaveBankReader form DirectX toolkit.
[Direct3D11] Breaking changes of DeviceContext.Map in case MapFlags.DoNotWait is used. Now DeviceContext.Map with MapFlags.DoNotWait will return an empty DataBox is still in used by the GPU.
[Toolkit.Graphics] Add RenderTarget2D implicit cast to Direct3D11.Resource
[Toolkit.Graphics] Add support for Texture.GetData with DoNotWait new flag.
[Toolkit.Audio]  Fix .Net2.0 Compat issues
[Toolkit.Input] Breaking changes of KeyboardState.  Now contains one states for Down keys and two events Pressed/Released since last frame.
[Toolkit.Audio]  Minor Refactoring
[Toolkit.Input] Change behavior of buttons handling for MouseManager using new ButtonState. Refactor code using ButtonState.
[Toolkit.Audio]  Fix Win8 Build problems
[Toolkit.Audio] Added SoundEffectInstance.IsLooped.

Tried to improve SoundEffect.Duration based on DirectXTk.

Started Code tidy-up and adding Document Comments.
[Toolkit.Audio] Changed SoundEffectInstance.IsLooped implementation.

Added SoundEffectInstance.Apply3D and SoundEffectInstance.Apply2D

Suped-up demo to make testing easier
[Toolkit.Graphics] Remove assert on DDSHelper when creating an image
[Toolkit.Game] Fix issue #237. Remove redundant code
[DXGI] Fix issue #244. Remove partial typeless format from FormatHelper.IsTypeLess for formats:  R32_Float_X8X24_Typeless/X32_Typeless_G8X24_UInt and R24_UNorm_X8_Typeless/X24_Typeless_G8_UInt
[Toolkit.Input] Fix issue on WinRT for released moust buttons
[Toolkit.Samples] Fix compilation issue on WinRT for MouseInput
[Toolkit.Audio]  Get it to complie under WP8