merging into master temporarily to facilitate testing, next version will have a more thorough integration.

Need to merge because James did not incorporate mutex into release versions yet.

roboticscape.service: missed rename: rc_kill_robot -> rc_kill

fix from Adam Bennett <abennett72@gmail.com> https://groups.google.com/d/msg/beagleboard/rkXxBQC1MnQ/dK61dCuxBwAJ



Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

Fix some typos in the balance example

Add INCLUDES to build dependencies

This adds INCLUDES as a build depedency in robotics.mk. This way, if you
edit a header file and run `make` for an example, the example will rebuild.