Closure-ify(still working): Barchart, Button, MultipleChoiceQ, MultiSele...


Work in prgress, still getting these 3 errors in the Closure compiler:
I have to compile the fake data as well.
```
answerman.js:42: ERROR - variable activities is undeclared
	var activity = (sequenceNode in activities) ? activities[sequenceNode] : "activity not found";
	                                ^

submitmanager.js:68: ERROR - variable AnswerMan is undeclared
		this.answerMan = new AnswerMan();
		                     ^

submitmanager.js:328: ERROR - variable fancyAnswerEngine is undeclared
fancyAnswerEngine = function (sequenceNodeID, submission)
```