Make Hair Color and Eye Color subclasses of Color. Make other requisite and appropriate revisions.

[michaelrabenberg]

I am exhuming a recommendation compiled from posts in #719 , which had been buried in the Discussion graveyard: Make Hair Color and Eye Color subclasses of Color.

I propose the following specific changes:

1. Give Hair Color this definition, along with the necessary subclassing: A Color that inheres in a Portion of Scalp Hair. [More on "Portion of Scalp Hair" below.]

2. Give Eye Color this definition, along with the necessary subclassing: A Color that inheres in an Iris. [Currently the definition holds that an Eye Color "inher[es] an Eye by virtue of the color of the Eye's Iris." I fail to see the motivation for this more complicated formulation.]

3. Give Scalp Hair this rdfs:label: Portion of Scalp Hair. [Maybe "Scalp Hair" can be an alt-label or pref-label.]

And while we're at it:

4. Give Facial Hair this rdfs:label: Portion of Facial Hair. [Maybe "Facial Hair" can be an alt-label or pref-label.]

[CarterBeauBenson]

I do not think they should be classes, personally. Otherwise, we should make "shirt color" and "logo color of a shirt" and "secondary logo color on a shirt".

Instead, there are just material entities and colors that inhere in them.