Revert "ExpUtil.getTotalExperience(Player) is now a delegate method for Player.getTotalExperience()."

This reverts commit 56d987f98de93c8c4828ac16e7f2331abe262f7f.
Actually fix the exp methods. Credits go to andrewkm (and cindy_k) for this fix.
Merge pull request #5 from SupaHam/fix-getTotalExperience

Fixed experience code (for real this time!)