moves qt code into rqt plugin
Squashed 'src/diarc/' changes from 17e8589..b807083

b807083 changes the way I append the final sub directory in __init__.py

git-subtree-dir: src/diarc
git-subtree-split: b8070833b1fe455e7f737a2784d2045b9ca75ee2
Merge diarc/libdiarc __init__.py path fix into devel
moved rqt menu group location, set window title
moves ros_topology.py from diarc into rqt_graphprofiler