Gallery admin dashboard

This is an initial stab at running omniture reports programmatically. It's a rest service which I've tried to wrap in `Omniture.scala`. 

Also tried to tidy up our admin charts code.

New Gallery content pv/v. The values should match the equivalent in Omniture report exactly (it did in testing).
![screen shot 2014-08-28 at 12 16 00](https://cloud.githubusercontent.com/assets/4549425/4074784/e7427f60-2ea5-11e4-8a7d-deb27534dccf.png)