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
[WinDX] IsMouseVisible in-bounding bug fix
[WinDX] IsMouseVisible in-bounding bug fix
[WinGL] IsMouseVisible in-bounding bug fix
[WinGL] IsMouseVisible in-bounding bug fix
[WinDX] small fix
[WinGL] small fix
Bugfix: DirectX effect files used sampler states in wrong order.

Sampler info stores textureSlot and samplerSlot separately.
SamplerStateInfo._dirty is true per default to always create a sampler state.
Rebuilt stock effects.
Incremented MGFX version.
Bugfix: SamplerStateInfo._dirty must always be set when a property is changed.
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 pull request #1460 from xanather/develop

[WinDX] + [WinGL]: IsMouseVisible in-bounding bug fix
Merge pull request #1461 from DigitalRune/samplerfix

Bugfix: DirectX effect files used sampler states in wrong order.