matplotlib/matplotlib — pull request #3726 by jenshnielsen (2014-10-26 18:28:51+00:00)
Title: Use a local copy of Rgb2lab to plot colormap guide

Closes #3442

This uses a local rgb2lab converted to avoid depending on scikit image when building the docs as suggested by @mdboom . Rather than implementing our own I have copied the one from scikit-image with a few modifications.