Prefab'd the capsule, and it's placed by code

The capsule has been "exported" as a prefab, and erased from the scene. Now it's put in the scene dinamically, by the script "engine.cs" (made only for testing purposes), which initializes three intances of the capsule at the beginning of the simulation.
added several coins of gold
the gold is perceived
corrected the initialization of the classes
now the gold is added programmatically
broken stuff
the agents move somehow
movement controller by rigidBodyController

The scene has changed a little bit. The gold prefab has a rigidBody attached, so that when an agent steps on it, it moves.

The movement of the agents is separated from the agent code, and now managed by RigidBodyController.