Explain the meetup and tweak the design

![screen shot 2014-10-18 at 13 29 07](https://cloud.githubusercontent.com/assets/287/4689613/63701202-56c2-11e4-991d-d535564e6871.png)

Following discussion in #1 and #5, add an about section to the home page and
lift the automaton to the top of the layout so it appears on all pages.