Properly tested art_pot driver, fixed bugs, and now be disabled. Moved all the experiments run so far into the "old" folder, and added a new experiment to test the art_pot driver.
Trying to figure out what is wrong with my art_pot / a* combo. Minor changes.
Fixed the looping problem in a_star.py (the one in algs). The planner now returns None if there is no path that can be found.