Migrate to alternative charting library

[gapple]

Google Charts is somewhat inflexible, and there is additional information that might be helpful to place on the charts that it is just not capable of.

Probably minor, but it also doesn't seem to cache in the browser well, with the dynamic loader, and charts can't be rendered when developing offline.

D3.js: https://github.com/mbostock/d3/wiki/Gallery

[gapple]

Dimple offers a simple API for creating charts with D3, but also exposes the underlying D3 layer for more complex visualizations.
http://dimplejs.org/

[marcomsousa]

See the Flotr2 ( http://humblesoftware.com/flotr2/ )

Advantages:
http://swizec.com/blog/flotr2-my-favorite-javascript-graph-library/swizec/4558

[gapple]

"Simple responsive charts": http://gionkunz.github.io/chartist-js/

[gapple]

library built on top of D3 that is optimized for visualizing and laying out time-series data
http://metricsgraphicsjs.org/