Fix broken links in documentation

Author: uvchik

doc/getting_started.rst

@@ -55,9 +55,9 @@ The basic usage of the windpowerlib is shown in the ModelChain example that is a
 To run the example you need the example weather and turbine data used:
 
  * :download:`Example weather data file <../example/weather.csv>`
- * :download:`Example power curve data file <../example/data/example_power_curves.csv>`
- * :download:`Example power coefficient curve data file <../example/data/example_power_coefficient_curves.csv>`
- * :download:`Example nominal power data file <../example/data/example_turbine_data.csv>`
+ * :download:`Example power curve data file <../example/data/power_curves.csv>`
+ * :download:`Example power coefficient curve data file <../example/data/power_coefficient_curves.csv>`
+ * :download:`Example nominal power data file <../example/data/turbine_data.csv>`
 
 Furthermore, you have to install the windpowerlib and to run the notebook you also need to install `notebook` using pip3. To launch jupyter notebook type ``jupyter notebook`` in the terminal.
 This will open a browser window. Navigate to the directory containing the notebook to open it. See the jupyter notebook quick start guide for more information on `how to install <http://jupyter-notebook-beginner-guide.readthedocs.io/en/latest/install.html>`_ and