review tutorial model configuration

[zugnachpankow]

Confirmed by multiple users: the my_exploit model in its configuration following the tutorial seems to produce a quickly declining fish stock and thus very limited social dynamics, as opposed to the very rich dynamics that can be seen in docs/tutorials/all-in-one/test.rst. An example for one run with the original configuration is given below:

Is this meant to be? Even playing around with some of the parameters did not seem to fix the problem, so i assume that there might be a typo or an underlying issue in maybe one of the processes, that i could not find yet though. Maybe it is possible to provide the code that produced the graphic in docs/tutorials/all-in-one/test.rst and compare it?