Adding missing D3D_FEATURE_LEVEL_10_0 support

D3D_FEATURE_LEVEL_10_0 was listed as one of the available feature levels when creating the D3DDevice.  However, when directX returned this as the selected feature, many of the setup code statements which attempted to create various shaders and resources didn't have an appropriate this case.

I've added the shader model 4_0 to the list of dxCompiledShaders and updated the appropriate places in the code so that this successfully initializes in the D3D_FEATURE_LEVEL_10_0 case.