more ergonomic admin interface

Actually trying to use the admin interface has caused me to realize it's missing some useful functionality - trying to make space in the admin interface, I removed some columns in the listing portion of the interface, and now you can click on the row in the list to highlight the corresponding pin on the map.

FYI I previously committed some stuff directly to master:
https://github.com/wetap/wetap-api/compare/bcab8e475b7d2ae31c577c8624bc8ed8379333ee...175348a0a7654ebe00559d9e495dda671fa8b3ee


![wetap ergo admin](https://cloud.githubusercontent.com/assets/217057/5521343/4af7cc78-8963-11e4-909e-31a1de5d714c.png)