Tighten up spacing between level dots in student progress view.
Merge branch 'finished' of github.com:code-dot-org/dashboard into finished
Header progress shows yellow ring for assessment level when it's current.
Multiple choice now has a button wrapping each choice.
Revert "Multiple choice now has a button wrapping each choice."

This reverts commit 1bcc60685cc7977e7e4fb3ca60cea0d566e6fbcc.
Make large answer images show properly on IE9 by moving height to immediate parent element.
Second attempt at buttons around multi choices.  Now using spans instead of buttons to work on IE9.
Merge branch 'finished' into delivered