Added all params, interactive legend, slider

All the motion params are shown and the legend is now interactive. The
styling has been cleaned up a bit, but could use more work.
Proper units for rotation- had to fix rickshaw bug

Rickshaw allows separate formatters per series, which will over-ride the
generic formatters that you can give to the HoverDetail. However, it
wasn't using these per-series formatters when rendering the hover detail
message.