Past-entry browser

We're still waiting on an import of past data to fill this in, but no reason not to roll in this stuff now.

See attached screenshots for in-use examples, using dummy data.
![safariscreensnapz001](https://f.cloud.github.com/assets/621995/2120674/91d571fa-91bf-11e3-9913-cef3cd07bf7a.png)
![safariscreensnapz002](https://f.cloud.github.com/assets/621995/2120676/944d57c2-91bf-11e3-9306-1bbd1c864ef8.png)
![safariscreensnapz003](https://f.cloud.github.com/assets/621995/2120677/95ecb3ac-91bf-11e3-8e46-4ddea4bbdfcf.png)
![safariscreensnapz004](https://f.cloud.github.com/assets/621995/2120678/97febe2e-91bf-11e3-90df-ead78732db64.png)