Alterations to C3 to handle step and area-step graphs, and accept options for additional changes to the view of area and line graphs.
Minified the changes made to c3.js
MAP-5714: Modified c3 to accept color.opacity as an value in pie charts.
MAP-5715: Fixed bug that denied view of negative values.
MAP-5822: 'No Data' text made more configurable.
MAP-5800: WIP
Fix event rect when x max/min specified - #171
Hide tooltip when hidden on custom xs - #154
Fix custom xs when 0 - #154
Fix resize when no data shown - #151
Refactor redraw
Fix subchart bug
Fix x tick rotate
Fix x tick rotate on Firefox
Fix event rect width when no data
Fix transition cancel on arc - #168
Fix tooltip value format for y2 - #159
Fix bug for tooltip position - #166
Do not hide ticks when no data shown - #151
Fix trivial