update to hydro (rx -> rqt, rosmake -> catkin)

- if possible could we change copyright to CC so that other institute/orgnization (like me) can distribute this, with adding their log or something?
- should we remove rosstack ? it seems that tool stil existing in indigo
- need to update rqt_bag image? more fancy one.
- the height of rqt_plot image is too tall?
- lower part of rqt_console need some message?
- do we need catkin_init_workspace? it seems catkin_ws/CMakeLists.txt is automatically generate during catkin_make process.