Add CompassOnly and BorderOnly guide modes
Add a little more granular control to the overlay. Still need to update
area handler.
remove unneeded files
Simplify the QDockAreaLayout and move it to the QDockArea module.
Rename manager->handler
Use dicts instead of rich objects to describe a dock layout.

Factory functions now generate dicts.
update QtDockArea to use the new dock manager
WIP commit