SharpDX Update For Windows Desktop and Store

The latest SharpDX binaries for Windows desktop and Windows 8 Store apps.  This was direct from the SharpDX repo as of the [May 22nd commit](https://github.com/sharpdx/SharpDX/commit/e2b20da5885e73b9801b66034a74f4dcd23950c1).

Note that the PR https://github.com/kungfubanana/MonoGame-Dependencies/pull/35 by  @Nezz should also be merged along side this one.

Also I deleted the SharpDX.Toolkit assemblies which MonoGame does not use.