Added the ability for UberEnchantments to appear in Villager trading
Added new config plugins/UberEnchant/mechanics/villager.yml to enable/disable the new Villager mechanics 'and set which enchantments don't appear in trading (includes vanilla enchantments)
added ability to add/set/remove attributes to items via commands Usage: '/uadd attribute <attribute> <value> <operation> [group]' '/udel attribute <key>' '/uset attribute <key> <value | operation | group> <value>'
Added support for the Grindstone. UberEnchantments now get removed/give xp when using the grindstone
Added new config plugins/UberEnchant/mechanics/grindstone.yml to enable/disable the new Grindstone mechanics
Added new entries for the new features to the default English locale
