ENH: a) fix the (usual) missing _DEBUG statement around some modules init/uninit/run, etc. b) allow for a more lightweight Slicer3. Default Slicer3 in debug/win32 is 2.5 GB! Turn BUILD_CLI to OFF to disable CLI plugins, Slicer3 is now 700 MB. Turn BUILD_MODULES to OFF to disable all modules together, Slicer3 is now down to 500 MB, compiles, links and launchs much faster, good for debugging and small hard drives (think SSD).

git-svn-id: http://svn.slicer.org/Slicer4/trunk@4306 3bd1e089-480b-0410-8dfb-8563597acbee