Start playing at a specific time via url fragments

This uses URL fragments similar to youtube and as described in the video 
examples here:

http://en.wikipedia.org/wiki/Fragment_identifier#Examples
I didn't have to change the Gruntfile.js, but I did drop the edu.harvard.edu plugins into the same plugin directory ("paella-matterhorn/plugins") as all the es.upv.paella (Matterhorn) plugins. The Grutfile iterated through all the plugins regardless of name. This was a version in a previous week, though, and the Gruntfile has changed since then, so worth revisiting.