Graph view based on flot

We have this before as our default graph view but switched to flotr2. However, flotr2 has IE issues and flot is now being very actively maintained so we should use introduce flot back.

My proposal here is that **rather than changing view.graph.js we create view.flot.js** (tbh this is a better approach generally - views should be named after the tool rather than the generic component).

At some point in the future (post 0.7 or even 0.8) we can deprecate flotr2 in favour of flot simply by setting

    recline.View.Graph = recline.View.Flot

Aside: we could make the the change here to move view.graph.js to recline.flotr2.js and have view.Recline.Graph point to recline.view.Recline.Flotr2 for consistency sake but this is optional.