V1 of moving to morris.js
Split the graph into multiple subgraph as a way to get around not having
multiple yaxis with morris.js
Show percentage change for 'change' metrics
No line smoothing
Error handling for bad extractor
Draw multiple graphs for metric and a single one for dashboards
Helpful information when there's no graph to show
Merge pull request #33 from smathieu/feature/morris

Replaced Hightcharts with Morris