Devfest

I put a callout on the main page.

![screen shot 2014-01-15 at 8 55 29 pm](https://f.cloud.github.com/assets/2433509/1927115/8bb37cb2-7e51-11e3-99ff-1e8ded60ea95.png)

And here's `/devfest`

![screen shot 2014-01-15 at 8 55 35 pm](https://f.cloud.github.com/assets/2433509/1927109/7f87d726-7e51-11e3-92c2-5d9f0ace7237.png)
![screen shot 2014-01-15 at 8 55 40 pm](https://f.cloud.github.com/assets/2433509/1927111/7f882f6e-7e51-11e3-9ffc-40e17c6fc63c.png)
![screen shot 2014-01-15 at 8 55 47 pm](https://f.cloud.github.com/assets/2433509/1927113/7f883ae0-7e51-11e3-89e9-7d3322bb2e48.png)
![screen shot 2014-01-15 at 8 55 53 pm](https://f.cloud.github.com/assets/2433509/1927110/7f87e856-7e51-11e3-9960-4d7495f207ed.png)
![screen shot 2014-01-15 at 8 55 56 pm](https://f.cloud.github.com/assets/2433509/1927112/7f88341e-7e51-11e3-8ef3-1a335ae1dd69.png)