Merge branch 'release_preparation' into dev

Author: SabineHaas

example/further_example.py

@@ -15,7 +15,7 @@
 except ImportError:
     plt = None
 
-import basic_example
+from . import basic_example
 from windpowerlib.turbine_cluster_modelchain import TurbineClusterModelChain
 from windpowerlib.wind_turbine_cluster import WindTurbineCluster
 from windpowerlib.wind_farm import WindFarm

windpowerlib/wind_farm.py

@@ -76,7 +76,7 @@ class WindFarm(object):
     ...    'wind_turbine_fleet': [{'wind_turbine': e126,
     ...                            'number_of_turbines': 6}]}
     >>> example_farm = wind_farm.WindFarm(**example_farm_data)
-    >>> example_farm.installed_power = get_installed_power()
+    >>> example_farm.installed_power = example_farm.get_installed_power()
     >>> print(example_farm.installed_power)
     45000000