On our way to Simulation Tests

[joshuamorton]

PTAL. ci_scripts/simulation passes locally, and so does ci_scripts/unittest, this feels stabler than it was before.

I'm a bit confused by the horrendously long timeout required in the simulation test, but it's necessary.

Also running with roslaunch buzzmobile simulation_test.launch gzclient:=True works, which I don't think did for me before, but I have no clue why that is (also note I made some related changes in pyros).

I'd like to be able to see rviz output as well, @sahit, do you know if there's a way to somehow show rviz data (or just do bits of buzzmobile namespaced topic visualization in gazebo)?

[joshuamorton]

Also whoever merges this, please squash it its gross.