Add Activity feed view

Adds a flagged off Activity pane.

![](http://f.cl.ly/items/0b0U1Q3j0c143I0P1b2b/Image%202014-11-07%20at%204.16.19%20PM.png)
@cmaher - you're right. i'm going to give that a try. 

Also - I want to try and add another field called `action` or something that keeps connects all the events associated with a single "action" like app start or navigate... The idea is that it'd be set by the first event and then associated with all the events that happen under a debounce of like 100 milliseconds. That way we capture all of the guys. Might not need this with a good enough depth though...