added last_updater to task table
added more robust killing of foreign jobs and writing up status update to temp file
added killing of last experiment and fixed bugs in run_experiment
changed the way hands are added to more intelligently avoid collisions in starting pose
Changed order of things so that previous jobs are killed before starting a new experiment
added killing previous jobs to make sure copy succeeds
added ability to remove robots from scene
added new test to check all legal finger lengths
to determine that they are in fact legal