Decreased the weight of DD items very slightly to make them a little
more rare. Added a section to DDLoot.mergeCategories() that searches for
the enchanted book loot and fixes its weight to 3 (instead of the usual
1). This makes enchanted books slightly more common. I confirmed that
books are actually spawning in loot chests. There is the possibility
that there is a built-in chance of an enchanted book taking up a chest
slot but not actually generating anything.
21d94b7c66