restrict tab completion to .concert and .test for rocon_launch and
rocon_test respectively.
rename to avoid tab completion.
blacklist the subscribers who eventually connect to the gateway
publishers as well.
python complains if you join when a thread isn't (yet) started.
advertise and graph tests working, but not fully functional yet.
various patches around pulled interfaces and remote gateway info.
consistent naming for gateway utility functions.
remove unused re import.
trivial printlog debugging for roslaunch parents in rocon_test.