Fixed small issues in Rover Planning

worked in wakari, not in ipython notebooks. weird.  good, actually; it
made the script need to be a little "tighter"
Wrote mazegen1.py

This creates a maze solvable by right turns only.
Rover planning 1 (right turns)

rover_planning_1.py is the right-turn only simulation on the maze.
currently doesn't use student_func correctly; I've added it at the top
as a stop-gap until I can get it worked out.
functions and basic conditionals introduced

framed with right-turn navigating rover.  has basic "animation" of  a
series of images the student can view.