Search

This adds :mag_right: to the inspector with both two way highlighting `(page) -> (inspector)` and `(inspector) -> (page)`.

![](http://f.cl.ly/items/170h3T0W1S2o051v3g38/Image%202014-10-25%20at%205.47.32%20PM.png)
I don't really like this pattern of `appObserver` methods delegating to locally defined helper methods. 

This was mostly done to easily get the `search` work from etsy into the extension. Also, I it's not clear to me what the proper objects should be yet, so i didn't want to box myself in.