1.3.2

In slider and double_slider, allow different left and right margins.

1.3.1

Made nearest_stops() (within slider() and double_slider()) a general function, d3panels.index_of_nearest().

1.3.0

Added functions slider() and double_slider().

1.2.3

Removed a bit of extraneous code. Oops.

1.2.2

Revised to use D3 version 4.

1.1.4

Last release that used D3 version 3