Hardware Skinning Support

- Supports GL, D3D9 & D3D11
- Extends vertex formats & shadergen to support blend indices and weights
- Adds basic support for using 4x3 matrices for shader constants
- Supports software fallback

Engine/source/shaderGen/shaderGen.cpp

@@ -265,6 +265,9 @@ void ShaderGen::_processVertFeatures( Vector<GFXShaderMacro> &macros, bool macro
             continue;
 
          feature->setInstancingFormat( &mInstancingFormat );
+
+         feature->mVertexFormat = mVertexFormat;
+
          feature->processVert( mComponents, mFeatureData );
 
          String line;