Fullscreen view for dashboards

Clicking the fullscreen button loads a view bereft of navigation chrome.

Original view with 2-column layout and refresh enabled:
![screen shot 2013-06-28 at 2 14 32 pm](https://f.cloud.github.com/assets/494338/723696/afb90810-e01e-11e2-820b-26922b500021.png)

View after clicking the fullscreen button:
![screen shot 2013-06-28 at 2 14 36 pm](https://f.cloud.github.com/assets/494338/723697/b34727dc-e01e-11e2-8c03-a1ede28cbcfb.png)

Related to #46 

/cc @jnewland @sr