ML interface

[svenpruefer]

Add an interface for using ML techniques for the AIs. This could be implemented as follows:

• decide what is the information players are allowed to see and use (e.g. enemy targets?)
• decide what the players can give back to the system (I guess targets for own seekers plus magnet switches?)
• make this data as one list of floats/integers (or whatever) available to the AI, sort of like a state vector
• let seekers call some external program (or python?) using this state vector and expect some list of floats/integers back
• document this interface ;-)