pothos-gui: began work on graph object GraphDisplay
Merge branch 'master' into widget_support
pothos-gui: messing with GraphDisplay render
Merge branch 'master' into widget_support

Conflicts:
	pothos-gui/GraphEditor/GraphEditor.cpp
pothos-gui: build fixes from last merge
pothos-gui: actually embedding qwidget -- so cool
pothos-gui: use QGraphicsObject for GraphObject base
pothos-gui: add missing include
Merge branch 'master' into widget_support

Conflicts:
	pothos-gui/GraphObjects/GraphBlockUpdate.cpp
pothos-gui: fix PropertiesPanelDock get draw()
Merge branch 'master' into widget_support
pothos-gui: GraphDisplay widget parent management
pothos-gui: fix GraphDraw::mouseMoveEvent to only render in move state
pothos-gui: fix graph connection text render
pothos-gui: cleanup drag rectangle
pothos-gui: fix GraphDraw::mouseMoveEvent to only render in move state
pothos-gui: fix graph connection text render
pothos-gui: fix to only allow auto-scroll under specific states
pothos-gui: added GraphDraw deselect and cancel select calls
pothos-gui: graph display installSceneEventFilter