FLORIS wake model implemented

New example using the FLORIS wake model

Added possibility to specify units

Created examples/docs/example_6_floris.py where floris and pywake are compared

added Plant Energy and Floris to CI-image

Introduced a plug-in type architecture

extended possible design variable input types:

  • [value]
  • [(value,'unit')]
  • [(value, lower, upper)]
  • [(value, lower, upper, unit)]