Book of Familiars

Minor patch/improvements:

• Added a button to toggle familiar revival in the book. By default it's turned on.
• Added a config to disable familiar revival as a whole. 
• Changed the automatic check on login config to false by default. This check is useful for mass deleting modded entities that no longer exist, but there is the potential for it to wrongly detect entities as non-existent and delete them. Use with caution.
• The whitelist and blacklist should no longer crash the game if you use an incorrect format. 
• The whitelist and blacklist should now accept mod ids as a whole. So you can add an entire mod instead of manually having to add each entity from it.