issue #617 implement SelectAll
issue #539 move fix for Mac native render bug to cellprofiler.gui and use it in pipeline list ctrl
issue #621 deselect mainline modules in pipeline list when an input module is activated. Some fit-and-finish fixes (SelectAll in pipeline list, reset the module settings group box text if no module is selected)
Merge branch 'multiprocessing' of github.com:CellProfiler/CellProfiler into multiprocessing