Add information

Author: SabineHaas

README.rst

@@ -33,6 +33,8 @@ If you have a working Python 3 environment, use pypi to install the latest windp
 The windpowerlib is designed for Python 3 and tested on Python >= 3.5.
 Please see the `installation page <http://oemof.readthedocs.io/en/stable/installation_and_setup.html>`_ of the oemof documentation for complete instructions on how to install python and a virtual environment on your operating system.
 
+For retrieving power (coefficient) curves from the Open Energy Database (oedb) the python package requests will be installed with your windpowerlib installation. The windpowerlib was tested with requests version 2.20.1 but might work with lower versions.
+
 Optional Packages
 ~~~~~~~~~~~~~~~~~
 

doc/getting_started.rst

@@ -32,6 +32,8 @@ If you have a working Python 3 environment, use pypi to install the latest windp
 The windpowerlib is designed for Python 3 and tested on Python >= 3.5.
 Please see the `installation page <http://oemof.readthedocs.io/en/stable/installation_and_setup.html>`_ of the oemof documentation for complete instructions on how to install python and a virtual environment on your operating system.
 
+For retrieving power (coefficient) curves from the Open Energy Database (oedb) the python package requests will be installed with your windpowerlib installation. The windpowerlib was tested with requests version 2.20.1 but might work with lower versions.
+
 Optional Packages
 ~~~~~~~~~~~~~~~~~
 

doc/requirements.txt

@@ -3,3 +3,4 @@ ipykernel
 nbsphinx
 pandas
 numpy
+requests

doc/whatsnew/v0-1-0.txt

@@ -1,6 +1,11 @@
-v0.1.0 (January 16, 2019)
+v0.1.0 (January 17, 2019)
 ++++++++++++++++++++++++++++++++++
 
+ATTENTION: From v0.1.0 on power (coefficient) curves are provided by the Open Energy Database (oedb) instead of in csv files (v0.6.0 and lower) due to legal reasons.
+Use :py:func:`~wind_turbine.get_turbine_types` to check whether the turbine types you need are included in the database.
+If your turbine type is not included you can either add it to the `database <https://openenergy-platform.org/dataedit/view/model_draft/openfred_windpower_powercurve>`_
+(see `API tutorial <https://oep-data-interface.readthedocs.io/en/latest/api/how_to.html>`_) or use your own csv file.
+
 New classes
 ###########