fix reset on win to let player fall off ledge again
add Game.reset function which changes Game.goal back to false, and calls Sphere.reset
Merge pull request #29 from salarkhan/fix-reset-on-win

fix reset on win to let player fall off ledge again
extend rear bound of box four to match image of path
remove unused createBox lines in Maze.create
add refactoring comment to motion.js
Merge pull request #30 from salarkhan/fix-rear-edge-box-four

Fix rear edge box four
Merge branch 'origin/bettywhite-gravatar' into gh-pages