Production cycles

[erolm-a]

Assuming #160 and #161 are implemented, we can go ahead and implement multiple production cycles.

This would cause a few changes in the code with respect to:

• the alternation between fallowing and normal operative times
• implementing a reset state for the cages (i.e. disable fallowing)
• making the reservoir dynamic. We need a better model for the external pressure that makes the external pressure change with the "age" of a lake: the more a lake is used the more eggs and lice will float around. This should ensure that with time the next production cycles will be worse off than the first one. See External pressure depending on lice population  #163
• payoff definition
• visualisation (should we be able to distinguish and select individual cycles?)
• optimisation