HTML5 Videos

I created a "videos" module that syncs play and pause events, as well as "major" (> 3 seconds) changes in the playback time.

Basically all of the work is in the "videos" file, except for including the new module in the Gruntfile and session, as well as disabling cursor click syncing on videos to prevent accidental firings of too many video-related events

The final version of towtruck that I was working with can be seen and UI tested here: https://pure-garden-2249.herokuapp.com/test.html