Content Update IX

Some cleanup. Reworking of Table D.3 for consistency and to properly capture EOHD instead of HD. Creation and description of Effective Reward Hit Dice (ERHD), used against the new table G.1 (and notes) for calculating XP values for creatures. I would have liked to make it less subjective, but there's always going to be decision-making for monsters, whether that comes from me or someone else. This is the best way I could think of to do it. Let me know if you note any errors or have any questions or suggestions.