Spilt Writing of Enchantments to seperate class
Created a new class cEnchantmentSerializer to serilize Enchantments to NBT.
This breaks a dependecy chain between cChunkGenerator and cWorld.
cEnchantmentSerializer is seperate from NBTWriter as it needs to access private members of cEnchantments
so having it seperate reduces the spread of the frein modifier
Switched EnchantmentSerilizer to namespace
Merge pull request #569 from worktycho/EnchantmentsFix

Enchantments fix