Fixed an issue where balance was not being updated after using the Enchanting Table or Anvil to repair.

The plugin now listens for events that change the level such as these and if they reduce the level, will also manually reduce the Total Experience for the player and updates the player data.

This is not normal behavior for Total Experience, as Minecraft usually has it as a cumulative amount and never subtracts from it, however, since we are creating an economy based on XP, this should be allowed to be reduced by actions the user takes.

Fixed an issue where XP calculations were not correct. Tested and checked that they match the XP Total amounts for specific levels as stated in the Wiki. Added an /xpconomy test command to display these level values on the console.