Adds IBM cvd pallete

add color pallete by Matthew A. Petroff

doc: Fix minor typo

To create data/ghibli.jl, I first downloaded
<https://raw.githubusercontent.com/ewenme/ghibli/master/inst/extdata/palettes.yml>
and parsed it to a Dict with YAML.load.

    colours_dict = YAML.load(<IO of palettes.yml>)
    colours_list = sort([k => parse.(Colorant, vs) for (k, vs) in colours_dict], by=first)
    for (name, vals) in colours_list
        print("loadcolorscheme(:", name, ", [\n")
        for v in vals
            print("        ")
            show(v)
            println(",")
        end
        print("    ],\n    \"Ghibli\",\n    \"Theme derived form the movie $name\")\n\n")
    end

Add Studio Ghibli palettes