-Added Device and Test
-Added Render Contexts and tests
-Added default device states
-Enum for depthformats (shortcut).
-Extension methods for depth format
-Default interfaces
-Added depthstencil,render target and texture 2D base
-Constructor for Depth
-Unit Test for depth creation
-Depth Creates Stencil for all supported formats
-Fix Typeless format for d32s8