Balance changes

After some playthroughs between myself and Couch_23, I've decided to make the following balance changes to the randomizer's logic:

The level 2 spell items will not appear until just before the Tower of Zot.  I was previously allowing them as early as Mysidia, figuring that was when the level 2 spells were available, anyway.  But it turns out they are generally much more useful than magic, and after looking it up, it appears they normally only started appearing as rare drops in the Tower of Babil.

The optional bosses in the Lunar Subterrane are now only going to yield weapons or armor.  There were several consumable items that were both good enough and allowed at high enough level that they were allowed to be the reward of those fights, which in a race setting would almost assuredly push all  those fights out of the range of worthwhile risk/reward ratios.

The Gold and Silver Apple price tags are going up.  If they show up in a shop, they enable you to dump money for stats for defeating Zeromus with less EXP grinding, and the ratio turned out to be about twice as good as I think was appropriate.