BackButton support for WP8
Added fake GamePad class
Implemented Game.Exit()
Merge branch 'orientation' of https://github.com/Nezz/MonoGame into wp8_backbutton_v2
Get BackPressed from page
Merge branch 'orientation' of https://github.com/Nezz/MonoGame into wp8_backbutton_V2
Updated template
Merge branch 'orientation' of https://github.com/Nezz/MonoGame into wp8_backbutton_V2
Merge branch 'orientation' of https://github.com/Nezz/MonoGame into wp8_backbutton_V2
ModelMeshPart.Effect now removes the old effect from the ModelMesh if no one else is using it.
Fixed mouse scroll wheel on WinDX desktop.
FindImporterByExtension() is no longer case sensitive.
Merge branch 'develop3d' of https://github.com/mono/MonoGame into wp8_backbutton_V2
Delete Render buffers for each Render Target binding in SetRenderTargets when the render target is passed as null which signifies resetting the Render Target bindings.
Fix to the ray-AABB intersection to resolve cases where hitting an edge would return false negatives
Merge pull request #1472 from kjpou1/develop

develop - Cleanup Frame Render buffers for RenderTargets
Fixed case where a disposed texture is still in the TextureCollection.
XAudio2 creation can fail.
Take out check for GL Error on FrambufferRenderbuffer commands in SetRenderTargets.
Merge pull request #1477 from kjpou1/develop

develop - Take out check for GL Error on FrambufferRenderbuffer commands in SetRenderTargets
Fix window sizing craziness on Windows. Now to check Linux.
Fix for the case where the ray points away from the AABB