robotic_arm: new simulink 1.57 with laser scanner mount accounted for.
hokuyo: testing hokuyo GD reply.
hokuyo: completed unit tests for hokuyo message format - used real data collected.
robotic_arm: status now have 'forces' values. Added 'stop' command alias for 'brakes'.
Merge branch 'master' of https://github.com/acfr/snark