Bukkit

Move saving to an async task in order to remove lag when promoting/demoting players with large files.

Removes all lag (that I can notice) when *SAVING* large files.

Obviously loading still happens in the main thread.

BACKUP ALL PERMISSIONS FILES BEFORE UPGRADING YOUR BPERMISSIONS!
"/permissions backup" command does this for you
THERE MAY BE A BUG WE DID NOT FIND IN OUR TESTING, IF THIS IS THE CASE, REPORT IT AND WE WILL FIX IT FOR YOU!

THIS RELEASE WILL BREAK PLUGINS THAT RELY ON THE OLD BPERMISSIONS API

THIS RELEASE WILL NO LONGER SUPPORT THE PERMISSIONS 2 BRIDGE

THIS RELEASE WILL NOT WORK WITH PLUGINS THAT RELY ON THE OLD BPERMISSIONS API

DO NOT UPDATE UNLESS YOU ARE SURE ALL YOURS PLUGINS ARE UP TO DATE

THIS RELEASE MAY BREAK YOUR EXISTING PLUGINS

THIS RELEASE REMOVES ALL LEGACY API SUPPOR