Add list of recent commits

Adds a list of recent commits authored by the authenticated user, based on their [public events](https://developer.github.com/v3/activity/events/#list-public-events-performed-by-a-user).

![screen shot 2014-06-11 at 19 32 33](https://cloud.githubusercontent.com/assets/65057/3248433/6f83084a-f18e-11e3-8da4-46ab48ff7caf.png)