Correctly resurrect dead agents; include other agents properties in state

[HelgeS]

No description provided.

[HelgeS]

@TimKam Preferences are generated as part of the desires.
Format is a dictionary, where the key is a key combination (action of first agent + action of second agent) and the numerical index of their preference for this action combination (lower means higher preference). It is in total order, although there can be action combinations which have the same result.

I had to make some changes to the generatePreferences method you proposed, but it should be possible to directly use the desires to calculate the actual reward.