ropensci/plotly — pull request #22 by mkcor (2014-05-07 19:52:48+00:00)
Title: Support geom_step

I followed suggestions by @tdhock to:
* avoid for loops in tests
* check that `geom_line` and `geom_path` end up with shape=linear
* support the conversion of different "linetype", "size", "colour" (Do we know how to handle "group"?)