Prepare for Radium integration - GuiBase

src/Mara/Gui/MainWindow.cpp

src/Mara/Gui/MainWindow.hpp

src/Mara/Gui/RendererControl.cpp

src/Mara/Gui/RendererControl.hpp

src/libRender/CMakeLists.txt

src/libRender/RadiumNBR/Gui/NodeBasedRendererGui.cpp

src/libRender/RadiumNBR/Gui/NodeBasedRendererGui.hpp

src/libRender/RadiumNBR/GuiBase/RendererPanel.cpp

src/libRender/RadiumNBR/GuiBase/RendererPanel.hpp

src/libRender/RadiumNBR/NodeBasedRendererMacro.hpp