Made the BlockBreakEvent handler ignore cancelled events, and use MONITOR priority. Without this, WoodCutter was bypassing protection plugins like WorldGuard and allowed players to chop down trees in regions.
Added support for the Unbreaking enchant. Calculating the damage to the player's axe should now properly account for the Unbreaking enchants.
Fixed tool not being broken. I noticed there was a fix for this before, but it did not seem to work for me. Setting the item stack's amount to 0 seemed to result in inventory de-sync for me. To fix this, I made it so the player's held item became null.