SharpDX samples updated

In the hope of resuming the series of SharpDX articles that I started writing nearly two years ago, the existing ones (Your first DirectX 11 Metro application using SharpDX and Basic Direct2D drawing with SharpDX) have been updated to Visual Studio 2012 and SharpDX 2.5.0. And as a bonus, the source code has been migrated from a single CodePlex project to separate GitHub repositories. You can find the basic SharpDX tutorial here and the Direct2D one here.