TODO:

1. Deal with gems.
2. Normalize to gear level. I think this means to normalize to iLvl purps.
3. Change model to one that generates lines in the tooltip rather than computes a value.
4. Enable all vectors, but only report "interesting" ones. What's interesting?
   * All vectors for the current class.
   * (Variant) All vectors for the current class where gear is appropriate type.


Q: Points to move to a readme. SageGearLevel (SGL)...
   * SGL helps players quickly assess whether an item is an upgrade for that
     character, for an alt, or for a raidmate.
   * SGL alerts players to best reforging, gem, and enchant choices.
   * SGL assesses overall gear level in a class- and spec- specific manner.

Q: When to display a vector's results for an item.
   * Whenever the vector is for the current toon's class, and might be remotely appropriate.
   *

Q: What additional info should be shown?
   * Reforge info


Q: Information a player wants to know about gear for the current toon:


Q: Information a player wants to know about gear for an alt:


Q: Information a player wants to know about gear for a raidmate:
   * When: Items which drop? Items while in a raid?