WorldGuard Support, Debug Improvements, Looting changes and Bug Fixes

[ + ] Added WorldGuard flags for HeadsPlus - flags include head-drop (whether heads should drop in a region), head-craft (whether heads should be crafted in a region), allow-mask-use (whether mask effects should be applied in a region or not), head-denied-ids (denied entity IDs to be dropped in a region) and head-allowed-ids (allowed entity IDs to be dropped in a region, overrides denied IDs)

[ + ] Implemented a new feature which should enhance event debugging. Currently, the only event making the most of this is the EntityDeathEvent that is used to drop mob heads. All events have yet to utilise this feature, not to mention that it is still in the works.

[ + ] Any errors caused in other plugins by HeadsPlus when using the anvil GUI are now gone

[ + ] Bossbar tracking now uses UUIDs instead of entities/players

[ + ] Changed the looting system to comply more with Minecraft's looting system - this includes common thresholds (always increases the drop amount), uncommon thresholds (attempts to drop a second time with a higher chance depending on the level) and rare thresholds (only increases the chance by 1%). For more information, see here.

[ + ] Fixed the HeadsPlus API not working properly

[ + ] Attempting to use /hp headinfo remove <Entity> lore no longer kicks you from the server, but is still slightly bugged.

[ + ] Fixed problems with case insensitive masks not working