Changes in version 1.2.2                        

BUG FIXES

  - Fix grayscale palette calculation
  - Revert changing strip background to transparent

                        Changes in version 1.2.1                        

BUG FIXES

  - Change strip background from white to transparent

                        Changes in version 1.2.0                        

CHANGES

  - Drop deprecated palette options.

                        Changes in version 1.1.0                        

CHANGES

  - Added a default discrete color palette from
    http://tsitsul.in/blog/coloropt/, deprecating the earlier choices of
    gdocs/viridis_d.

BUG FIXES

  - Formula for calculating grayscale palettes changed