Summary data

Add the ability to display small bits of text in a 'summary' bubble in the toolbar. This lets panels bubble up counts and aggregate statistics like number of things, or time & memory stats. It ends up looking like:

![screen shot 2014-08-30 at 10 06 30 pm](https://cloud.githubusercontent.com/assets/24086/4101633/cd093c90-30fa-11e4-9843-e054ba1d67c1.png)

This will require clearing your existing debug_kit db to see the change.