Added possibility to specify units
Created examples/docs/example_5_floris.py where floris and pywake are compared

added Plant Energy and Floris to CI-image

moved example data files

resat topfarmkeys after example 6 ran

updated no_print statement

added plantenergy to ci-file to catch changes
added search for topfarm.plugins to the init-file

fix pep8

figs

extended possible design variable input types:
[value]
[(value,'unit')
[(value, lower, upper)]
[(value, lower, upper, unit)]

updated example 6 accordingly