Update docs

Author: uvchik

README.rst

@@ -6,6 +6,8 @@
    :target: https://doi.org/10.5281/zenodo.824267
 .. image:: https://mybinder.org/badge_logo.svg
  :target: https://mybinder.org/v2/gh/wind-python/windpowerlib/dev?filepath=example
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/psf/black
 
 Introduction
 =============

doc/getting_started.rst

@@ -2,6 +2,17 @@
 Getting started
 ~~~~~~~~~~~~~~~~~~~~~~
 
+.. image:: https://travis-ci.org/wind-python/windpowerlib.svg?branch=dev
+    :target: https://travis-ci.org/wind-python/windpowerlib
+.. image:: https://coveralls.io/repos/github/wind-python/windpowerlib/badge.svg?branch=dev
+    :target: https://coveralls.io/github/wind-python/windpowerlib?branch=dev
+.. image:: https://zenodo.org/badge/DOI/10.5281/zenodo.824267.svg
+   :target: https://doi.org/10.5281/zenodo.824267
+.. image:: https://mybinder.org/badge_logo.svg
+ :target: https://mybinder.org/v2/gh/wind-python/windpowerlib/dev?filepath=example
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/psf/black
+
 Introduction
 =============
 

doc/whatsnew/v0-2-1.rst

@@ -0,0 +1,34 @@
+v0.2.1 ()
+++++++++++++++++++++++++++++++
+
+API changes
+#############
+
+
+Other changes
+#############
+
+* A WindpowerlibUserWarning is raised if the weather data contain nan/null values. If you are aware of the nan-values you can filter the warning. (`PR 96 <https://github.com/wind-python/windpowerlib/pull/96>`_)
+* Raise an error if diameter of rotor is greater than the hub height.
+* Raise an error if "farm efficiency" method is chosen but no farm efficiency is set.
+* Data height in weather data DataFrame can be of type string and will be converted to numeric internally. This makes is easier to read a csv-file with a header using pandas read_csv function.
+* Code-style is now "black".
+* Licence changed from GPLv3 to MIT.
+
+
+Documentation
+#############
+
+Bug fixes 
+###########
+
+
+Contributors
+############
+
+* Birgit Schachler
+* Sabine Haas
+* Uwe Krien
+* @vezeli
+
+