Show Community in a Table

Since there are so many and the wall of avatars has become too large (a good problem!). 

**This PR**
- puts the Govs and Civic Hackers into tables.
- adds basic search
 - I found something super simple in a JSFiddle actually and added some _no matches_ logic.

**Ponderings**
- The amount of avatars we have to go and fetch is a bit redonk now. It's not the worst, but it will only get larger.
- Would it be nice to have more information about each org? This will likely require some manual work but it may be worth it for a nice dataset to have.

**WIP**
I'm going to refine some of the styles a bit more, but wanted to get the convo started.

![screen shot 2014-06-18 at 2 27 42 pm](https://cloud.githubusercontent.com/assets/1305617/3320842/ad7edce0-f72f-11e3-801b-17017ae78d3f.png)

![screen shot 2014-06-18 at 2 27 57 pm](https://cloud.githubusercontent.com/assets/1305617/3320844/b32aaaf2-f72f-11e3-97fd-fec5965bcc43.png)

![screen shot 2014-06-18 at 2 28 59 pm](https://cloud.githubusercontent.com/assets/1305617/3320845/baa61f28-f72f-11e3-829d-1f0248810c30.png)

![screen shot 2014-06-18 at 2 28 17 pm](https://cloud.githubusercontent.com/assets/1305617/3320846/bd50392a-f72f-11e3-8662-d9ddf133d231.png)