Speaker abstracts

This adds abstracts-on-hover to the schedule table. I've added the first abstract for @beerops and will continue to add other ones as I have them, but I'll mention it to speakers that they can add/edit theirs as they see fit (with pull requests).

Demo:

![screen shot 2013-09-06 at 12 03 50 am](https://f.cloud.github.com/assets/494338/1093673/6d623e3e-16a9-11e3-932a-a57486b001bf.png)