Biggest update yet.
API Update using interfaces
new command: /fxhelp
new registry system
NO MORE ATTRIBUTE CLASSES REQUIRED NOW
new structure to behavior files using abstract classes and action booleans
Rarity system (enum)
update to command registry
new Annotation: @AutoRegister (automatically registering behavior classes)
3 new exceptions
2 new listeners to help the behavior files run
Lang.yml, lets you customise messages sent by the plugin, more will be added soon
RarityLang.yml, lets you choose how the text for rarity appears in the item's lore
OneTimeCrafts.yml, handles whether the items marked as a one time craft are crafted or not

Full Changelog: v1.1...v1.2