Added todo.txt

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+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?
+