rtt_ros: also parse rosbuild manifest.xml files and add rosbuild package
paths to the search paths list
rtt_roscomm: added rosbuild support in ros_generate_rtt_service_proxies()
merging rosbuild/genmsg support
Adding a place to put unit tests
Merge branch 'hydro-devel' of github.com:jhu-lcsr-forks/rtt_ros_integration into hydro-devel