Merge pull request #401 from steve-lunarg/samplers

HLSL: Add texture Load method & decomposition

glslang/Include/Types.h

@@ -86,6 +86,7 @@ struct TSampler {   // misnomer now; includes images, textures without sampler,
     bool isTexture()     const { return !sampler && !image; }
     bool isShadow()      const { return shadow; }
     bool isArrayed()     const { return arrayed; }
+    bool isMultiSample() const { return ms; }
 
     void clear()
     {