Add alternate graphing libraries, such as Cubism, and expand Rickshaw types

[ndbroadbent]

I'm reading up on everything to do with Graphite, and came across Cubism from Square. It looks like an awesome way to visualize data from Graphite, so I'm wondering if we could add that to the new version of team dashboard.

It would also be cool to add support for all of rickshaw's graph types. (looking forward to the possibility of a pie chart type.)