Fronts tool: page-view graphs

Graphs are off by default, as the data is not yet from a dedicated Ophan API, but from an Ophan dashboard endpoint. To enable graphs add `?pageViews` to the url. 
![fronts-admin](https://f.cloud.github.com/assets/1147913/924888/07d767e2-ff70-11e2-884d-14838ec11d44.png)