Scripts to reorganize equipment directory structure.

The script organize_equipment is for one time use to organize the
equipment of the 2 biggest equipment art contributors.

The script moveEquipmentPNG moves images to other folders and renames the
occurences of its references:

 tools/moveEquipmentPNG.py sprites/equipment/female/unknown/goldbelt/* sprites/equipment/female/belt/goldbelt

will move the goldbelt to the belt cathegory (away from unknown).