Adaption of FreeCAD to QuarterWidget

-removes all soqtviewer references
-create a quarter adaptor class which implements missing functionality
-adopts freecad code to make use of SoRenderManager and changed View3DInventorViewer  interface

src/Mod/Assembly/Gui/CMakeLists.txt

@@ -5,7 +5,6 @@ include_directories(
     ${COIN_INCLUDE_DIR}
     ${ZLIB_INCLUDE_DIR}
     ${QT_INCLUDE_DIR}
-    ${SOQT_INCLUDE_DIR}
     ${PYTHON_INCLUDE_PATH}
     ${XERCESC_INCLUDE_DIR}
     #${ODE_INCLUDE_DIRS}