FEATURE: Added support for stepPlot per-series.
BUG FIX: Fixed indentation in respect to the jslint rules.
FEATURE: Added stepPlot option per series for all plotters.
BUGFIX: stepPlot per series now also works correctly for the
stackedGraph and fillGraph options
FEATURE: Added tests for stepPlot option per series
BUGFIX: Renamed test to capital case, fixed global var stuff, renamed
file to lower case
BUGFIX:

Corrected tests for stepPlot per series
Merge pull request #204 from sauter-hq/55eb8485b406174f15dcee0e97abc4c466de7733

Added support for stepPlot per-series