This pull request mostly fixes #181

RangeSlider and Smoother now accept optional wrapper that can be used to provide alternative solution to jquery/jqueryUI.

SeriesToggle now accepts sortable:false config var that will make the jquery DND codepath optional.

This brings rickshaw to be almost completly js framework agnostic and mostly fixes #181 bug report.

#181 will be 100% fixed after I come up with alternative DND solution - I think it might be a good idea to ship native HTML5 implementation of DND, and then fallback to jquery/wrapper around some other lib.