STYLE: Add RPI to copyright header

Base/Core/CMakeLists.txt

Base/Core/imstkModule.cpp

Base/Core/imstkModule.h

Base/Scene/CMakeLists.txt

Base/Scene/imstkScene.cpp

Base/Scene/imstkScene.h

Base/SimulationManager/CMakeLists.txt

Base/SimulationManager/imstkSimulationManager.cpp

Base/SimulationManager/imstkSimulationManager.h

CMake/imstkAddLibrary.cmake

CMakeLists.txt