Tomes

BUGFIXES:

 - Fixed issue where hovering over empty enchanting table slots while using the Linguist spell would cause a crash.

 - Solved problem where servers would not work due to non-existent classes being used.

 - Sorted out an exploit with how Advantageous Growth spell works; should now only spawn extra crop drops if the crop is fully grown.

 - While only normally obtainable in creative, a tome enchanted with spells from a different category can now use them without problem.

ADDITIONS: 

 - Added various particles and prettiness to a bunch of spells.