BUG: Fix PBR textures

Examples/DeformableBody/DeformableBodyExample.cpp

Examples/Rendering/RenderingExample.cpp

Examples/SPHFluid/Fluid.hpp

Source/Common/imstkColor.cpp

Source/Common/imstkColor.h

Source/Geometry/Mesh/imstkSurfaceMesh.cpp

Source/Geometry/Mesh/imstkSurfaceMesh.h

Source/Rendering/CMakeLists.txt

Source/Rendering/Materials/imstkRenderMaterial.h

...erer/RenderDelegate/imstkVTKSurfaceMeshRenderDelegate.cpp

...nderer/RenderDelegate/imstkVTKSurfaceMeshRenderDelegate.h

Source/Rendering/VTKRenderer/imstkVTKRenderer.cpp

Source/Rendering/VTKRenderer/imstkVTKTextureDelegate.cpp