Help adding hterm support (?)

[sirosen]

hterm doesn't have a lot of complexity to its config, but you have to put colors in an array in the right order, which can be a PITA.

Here's what I did for the base light colored gruvbox theme:

[
  "#cc241d",
  "#98971a",
  "#d79921",
  "#458588",
  "#b16286",
  "#689d6a",
  "#7c6f64",
  "#928374",
  "#9d0006",
  "#79740e",
  "#b57614",
  "#076678",
  "#8f3f71",
  "#427b58",
  "#3c3836",
]

It was fine to write this all out by hand for one of these, but I wasn't sure if there's some way I could potentially parse color.table sensibly to generate these?
I don't want to write a ton of this by hand when I only use one theme myself.

(Also, as I'm sure others have said before, thanks for making gruvbox!)