pycolorname: Add generic module ColorSystem
pycolorname: Add generic module ColorSystem

The ColorSystem class is an abstract class that will help to fetch
color systems based on some data that is given.

Fixes https://github.com/AbdealiJK/pycolorname/issues/2

AbdealiJK/pycolorname,AbdealiJK/pycolorname,AbdealiJK/pycolorname,AbdealiJK/pycolorname