joewalnes/smoothie — pull request #7 by shashkin (2012-03-06 08:58:45+00:00)
Title: Allowing transparent background for charts

In my project I need charts to have transparent background (to place them over background images)
I noticed that simple setting `grid.fillStyle` option to `rgba(0,0,0,0)` does not work properly, so I've added this tiny little fix which allows transparent background.