You can clone with
HTTPS or Subversion.
To make rickshaw compatible with Drupal 7, I would suggest replacing the jQuery '$' operator, especially in the RangeSlider functions with 'jQuery'. The first occurrence in the RangeSliderfunctions in version 1.4.6 seems to be at line 2412.
This would be a great support for Drupal 7 developers trying to make use of the RangeSlider feature.
Thanks and best regards
make jQuery dependent bits compatible with jQuery.noConflict(); fixes #…