IFactionPlayerJoinIFactionEvent & IFactionPlayerLeaveIFactionEvent added.
Added two new events for APIs to listen to:
- IFactionPlayerLeaveIFactionEvent (Handles kick).
- IFactionPlayerJoinIFactionEvent
Also, optimised imports and fixed an issue with FactionsBlue's rename event.
Added a key to the README.md (GitHub) to specify which version of the plugin each event was added in.