Added verbose option for console logs and fixed a bug where items didnt get properly updated
Added a verbose-level option in config:
That ranges from HIGH to NONE. It only controls console outputs.
Fixed a major bug in TrackedItem#update(). Items sometimes didnt get updated item-side but were database-side, which was causing items to get clear at the next lookup.
The method was executed on the wrong thread and was trying to access Bukkit's AP.
Improved performances by fixing Tracker#updateInventorySafely() method (it was shit). The plugin don't appear anymore on spark's profiler.