ENH: added qMRMLWindowLevelWidget, started filling in qVolumes module
git-svn-id: http://svn.slicer.org/Slicer4/trunk@12314 3bd1e089-480b-0410-8dfb-8563597acbee
git-svn-id: http://svn.slicer.org/Slicer4/trunk@12314 3bd1e089-480b-0410-8dfb-8563597acbee