Summary: Also did some misc cleanup in khan-exercise.js, mostly related to module-y things ("151 ++----"). I combined local jquery-ui into one file to make it easier to load. Test Plan: Opened addition_1, deriviative_intuition, graphing_points_2 locally, and all looked fine. In webapp/khan-exercises/, ran: ``` npm install -g requirejs r.js -o requirejs.config.js ``` then saw that /exercises/addition_1 looked right. Reviewers: eater, jack Reviewed By: jack CC: alex Differential Revision: http://phabricator.khanacademy.org/D7095
…tly-expanding whitespace problem in the cleaner.