Add option to calculate AEP as described in the European Wind Atlas, page 95. This method calculate the power x weibull_weight using linear instead of constant power segments

Reduce memory consumption in PropagateDownwind by doing inplace flattening of dw_iil, hcw_iil and dh_iil. Note that this may have side-effects in the parent functions

before default rotor center was shared among wind farm models, i.e. wakedeficit model of last instance was applied to all instances

Implemented wake_radius() function for the different wake models and modified args4turb to be independant from deficit

- add test, which tests aep probability normalizing for two turbines
- remove not-needed autograd switch

Added different superposition models for turbulence intensity, as StenFrandsen uses effective turbulence intensity instead of the usual added turbulence intensity

add selfsimilarity blokage model
prepare for gradients
New structure. Old WakeModel mainly in new EngineeringWindFarmModel
add deflectionmodel
update documentation