bnmnetp/runestone — pull request #225 by isaacdontjelindell (2013-07-23 19:01:27+00:00)
Title: Miscellaneous visual tweaks 

* Tweak layout of gittip button
* Add some spacing to Codelens "Check your understanding" modal
* add a "Play" button overlay to video directives to make it clearer that clicking will start a video
* If the user doesn't answer an assessment (MCMA, MCMF, fitb, etc), don't print "null"