World Structure Image (GRIDIMG)

// WORLD STRUCTURE GRIDIMG
// 
// Fixed data structures as n x m arrays (spatial copy of GRIDSPC)
// 
// FORMAT of a CELL:
// [IMG, IMGC]
// IMG:= ASCII-String of an image
// IMGC := CODE for some BINARY FILE OF AN IMAGE
//
// COMMENT: Because in this world only one object can be placed at the same position = cell, 
// only one graphical representation can be placed at this position = cell
//
// IMAGELIB
// Is a library of preinstalled images, which can be activated in world W1. 
// Format:
// [[IMGC, IMAGE]; ...]