Decrease the speed of FallCurse because it causes a lot of 'moved too quickly' messages, teleport players upward if they're underground.
When a furnace spell is used, only subtract one book from each use. bug 5:resolved
Only remove one book from a user's hand if they have multiple when they use a spell. bug 2:resolved
Merge pull request #20 from nasonfish/master

Decrease the speed of FallCurse and teleport underground players up if they're cursed, subtract only one book from furnaces/hands