Fix:
1. /qs help command only show /qs help one help for normal players
2. Some listener not unregister when plugin boot failed
Changes:
1. Use async to checkInventory and send task to sync queue to let plugin can do more checks and without effect the performance
2. Remove dupe checks to optimize the performance
Add:
1. Add a option to control player loan even economy return allow or trading-success.
2. Add a option to control displayProtection msgs visable or invisable.
3. A lot new events to allow you do more things.