Changing wording of isle problems: rate --> probability
Fixing bug in quiz problem where parameter node equation box is editable.
Merge branch 'master' of http://github.com/bvds/LaitsV3
Merge branch 'master' into sachin
Fixed a bug with the error text.
Merge branch 'master' of http://github.com/bvds/LaitsV3
PS3 and Lesson learned fornt increased
Merge branch 'master' of https://github.com/bvds/LaitsV3
Fixing error message strings (and logic, for table view).
Merge branch 'master' into jonwetzel
Added new functions for figuring out if nodes are correct AND match the author's model.
Adjusted lessons learned to use the new correctness check too.
Adding quiz problem two.