Labyrinth: map functionality

Idea: to allow the player to track the exploration of the labyrinth. (Hint: the "print" command is a cheating and should be used for debug only.)

Stage 1:

• To enable this functionality, the player should find a special object in the labyrinth - a "map".
• The "map" object should be displaced in the labyrinth randomly (like "treasure").
• The "map" object should be correctly rendered by the rendering functions (it should be visible on "print")
• The "map" object should be of type "Content".
• The player should get a flag in the inventory that indicates that the "map" object is found.

Stage 2: Tracking algorithm

• The "map" command should display where the player has traveled so far.
• The tracking algorithm can be any (no special requirements).

Hints on data types:

• Trail can be of types Map.Map ( Map.Map Pos (Cell, Content) ), Set.Set ( Set.Set Pos ) or just a list ( [Pos] )

Hints on how to approach the task:

• Add a dummy command "map" with some trail predefined and rendered