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.
Add pie.expand and donut.expand option - #153
Merge pull request #155 from slajax/master

Add component support to c3
Add onmouseover/onmouseout for legend item
Fix bug when arc with timeseries data
Merge branch 'master' of github.com:masayuki0812/c3
Modify default of axis.x.localtime to true - #161
Add axis.x.padding option - #167
Enable ygrids for y2 - #132
Enable y directed regions - #132
Fix clip path for axis
Fix axis.x.tick.fit/count logic - #156
Fix tooltip when scatter plot
Revert legend item hidden style because of flicker
Fix opacity for hidden legend item
Add axis.x.show option - #135
Add axis.x.tick.rotate and axis.x.height for tick text rotate - #138