added tests for checklist problems, discussion search
added checklist & discussion search tests
added discussion and checklist tests for real this time

I think I finally did it right. This should have the entire test suite
and all of the changes I made.
fixed broken tests, added discussion test
removed checklist test

The checklist example no longer exists in the demo course. And this
test was more for practice, anyway.
Merge branch 'nthaniel'

Conflicts:
	SeleniumCases/DemoDiscussion.html