[Build] Start to migrate from Nant to msbuild for building/packaging
[Toolkit.Graphics] Add BufferFlags.StreamOut
[Build] Fix assembly signing
[Toolkit.Game] Fix issue #389, NullPointerException on Game.Exit()
[Direct3D11] Fix issue #390. Remove ImageLoadInformation from WinRT/WP8 builds
[Toolkit.Game] Separate Game/GameSystem.LoadContent from Initialize, in scenarios where Initialize method is overriden, the base.Initialize should not start to load content until all game systems are initialized
[Toolkit.Game] Fix regression on Window.AllowUserResizing