Implemented `send_mesg_test_mode()` in `command.c` in order to
test the `_watchman` in `sentinel`. Unfortunately, the watchman
doesn't seem to work, so I have disabled it for now.
Merge https://github.com/aore/mars-rover into aore-master
Merge branch 'master' of git://github.com/asr1/mars-rover into aore-master

Conflicts:
	rover/mars-rover.cproj
	rover/src/control.c
Merge pull request #10 from dwtj/master

send_mesg_test_mode()