Add panes to the Inspector

We add the Radio, Data, and activity pain here. honestly I should have added app and maybe settings too while i was in there.

![](http://f.cl.ly/items/2e3Q1z0J271j3m3n1F0S/Image%202014-10-29%20at%203.36.25%20PM.png)

This is a farily big change in terms of files, but it's really all boiler-plate.

Now that we have 4 panes. I felt it was time to introduce a base class like what we have at Etsy.