Multiple normalized series causes "seriesData.forEach not defined"-Exception

Because seriesData is null at this point. The data does contain less elements than this.series. 
btw: Iterating over an array with the index of another array seems dangerous to me. So my quick fix won't be the best one anyway.

Example code can be found here: https://github.com/unSinn/plant-vertx/blob/master/webroot/js/plant.js
Merge pull request #258 from unSinn/patch-1

Multiple normalized series causes "seriesData.forEach not defined"-Excep...
add back using our own index iterating through series
add multi renderer to combine different renderers on one graph
add minimal error checking around series renderers in multi renderer
Merge branch 'master' into gh-pages