Single precision all models

docs/notebooks/Optimization.ipynb

py_wake/deficit_models/vortexcylinder.py

py_wake/deflection_models/fuga_deflection.py

py_wake/examples/data/iea37/_iea37.py

py_wake/site/shear.py

py_wake/site/xrsite.py

py_wake/superposition_models.py

py_wake/tests/test_utils/test_numpy.py

py_wake/utils/area_overlapping_factor.py

py_wake/utils/model_utils.py

py_wake/utils/numpy_utils.py

py_wake/utils/xarray_utils.py

py_wake/wind_turbines/power_ct_functions.py