Test Cozmo odometry with visual landmarks present: Turn vs. DriveTurn.

Does Cozmo use his accelerometer for odometry?  Try putting him on a sheet of
paper and rotating the paper.

Particle filter exercuse: give a printed map showing where to put the cubes.
Have Cozmo drive around randomly (but choose trajectories that avoid the cubes
and also avoid straying too far from the cubes) and observe the particles.

Homework: compare distance-based slam with bearing-based slam.
Write a function to combine distance and bearing info; can we use this to
navigate using a single landmark?

Note: knowing our bearings to landmarks is not the same as knowing the 
orientation of an asymmetric landmark.