3.3.13 Selling items at shops and other changes and fixes

Version 3.3.13 (take 2)

• Shops will now buy certain items from you.
• Super potions are now available! Want to go above your max attribute stats? Grab a super potion.
• New option to adjust volume of sounds.
• A few message log updates. (More things log).
• Thanks Richard for noticing the white pixel issue on water bridges.
• Idle Hands combat tweaks. Oh oh!