All discrete scientific colorschemes are one color short

[kdyrhage]

All discrete (i.e. numbered) colorschemes from the scientific suite appear to be one color short, specifically the first color. For example, colorschemes[:acton10] contains 9 colors, not the expected 10, and colorschemes[:acton100] contains 99 colors. This seems to have been introduced in db7ed7b. I will make a pull request that addresses this issue.

[cormullion]

Hi! I might have made an off-by-one error in my code 😂 (I have a script that scans the directory and builds the data files…)