Backpacks can make different sounds, fixed default config error.

Fixed lack of headmin rank in default admin_ranks.txt, which spits out 3... duplicate runtime errors everytime you run the game with default config.

Storage items can now be given unique sounds! It will play the sound chosen when you pick up the item, open it up, drop it, put it on, and take it off.

Clown backpacks honk.
Mime backpacks are deathly silent.
Bibles make paper rustling noise.

Also I moved the mime backpack under backpacks because SOMEONE had it under satchels.