REFAC: Move around libraries for better modularity

CMakeLists.txt

Source/Materials/CMakeLists.txt

Source/Materials/imstkRenderMaterial.cpp

Source/Materials/imstkRenderMaterial.h

Source/Materials/imstkTexture.cpp

Source/Materials/imstkTexture.h

Source/Rendering/CMakeLists.txt

Source/Rendering/Testing/CMakeLists.txt

...e/Rendering/Testing/imstkRenderAnalyticalGeometryTest.cpp

Source/Rendering/Testing/imstkRenderScreenshotTest.cpp

Source/Rendering/Testing/imstkRenderSurfaceMeshTest.cpp

Source/Rendering/Testing/imstkRenderTest.cpp

Source/Rendering/Testing/imstkRenderTest.h

Source/Rendering/Testing/imstkRenderTetrahedralMeshTest.cpp

Source/RenderingCore/CMakeLists.txt

Source/RenderingCore/imstkRenderer.h

Source/RenderingCore/imstkTextureDelegate.h

Source/RenderingCore/imstkTextureManager.h

Source/RenderingVTK/CMakeLists.txt

...eringVTK/RenderDelegate/imstkVTKCapsuleRenderDelegate.cpp