rqt_py_common) add a new method.
rqt_marble) Modified CMakeLists.txt to add more explicit order of
compilation, based on this q-a thread.
http://answers.ros.org/question/62092/catkin_make-started-failing-to-generage-h-from-msg/
Merge branch 'groovy-devel' of https://github.com/ros-visualization/rqt_common_plugins into groovy-devel