Moved rgl from Imports to Suggests to reduce startup
load (#2, Kent Johnson).
Moved maps from Depends to Imports.
New function pal.heatmap2().
Added value-suppressing uncertainty palettes.
brewer.pinkblue is renamed
brewer.seqseq1.
brewer.orangeblue is renamed
brewer.seqseq2.
covr coverage exceeds 90 percent.
Added tableau20 palette.
Added penobscot data.
Added cividis palette.
Added brewer.* bivariate palettes.
The stepped() palette gains 4 shades of gray for 24
total colors.
Re-named pal36() palette to
polychrome().
First CRAN release.
Include maps in Depends, otherwise there is an error
about countyMapEnv.