presnick/runestone — pull request #61 by nickdotreid (2014-04-26 17:46:30+00:00)
Title: Grader Error + Grade Module Improvements

I fixed the grader error on earlier prompts -- basically ungraded acid tables somehow have their grade value set to None, which when summed with ints throws an error -- I added a line to scores module to enforce that scores.points is always numberic (or 0)

I also added some javascript to make the 'save and next' button work

please merge and push to live site