Data in csp example cannot be found
The path in the scripts is given in uppercase letters, therefore the files cannot be found. 
diff --git a/examples/concentrating_solar_power/csp_collector_plot_example.py b/examples/concentrating_solar_power/csp_collector_plot_example.py
index 8dc6d22..0764c2e 100644
--- a/examples/concentrating_solar_power/csp_collector_plot_example.py
+++ b/examples/concentrating_solar_power/csp_collector_plot_example.py
@@ -9,11 +9,11 @@ import matplotlib.pyplot as plt
 
 # precaluculation #
 
-dataframe = pd.read_csv('CSP_data/data_Muscat_22_8.csv', sep=';')
+dataframe = pd.read_csv('csp_data/data_Muscat_22_8.csv', sep=';')
 dataframe['Datum'] = pd.to_datetime(dataframe['Datum'])
-df_temp_amb_series = pd.read_csv('CSP_data/data_Muscat_22_8_midday.csv',
+df_temp_amb_series = pd.read_csv('csp_data/data_Muscat_22_8_midday.csv',
                                  sep=';')
-temp_amb_series = pd.read_csv('CSP_data/temp_ambience.csv', sep=';')['t_amb']
+temp_amb_series = pd.read_csv('csp_data/temp_ambience.csv', sep=';')['t_amb']
 
 # parameters for the precalculation
 periods = 24
diff --git a/examples/concentrating_solar_power/csp_plant_example.py b/examples/concentrating_solar_power/csp_plant_example.py
index 26716d4..542e07f 100644
--- a/examples/concentrating_solar_power/csp_plant_example.py
+++ b/examples/concentrating_solar_power/csp_plant_example.py
@@ -15,7 +15,7 @@ import oemof.outputlib as outputlib
 
 # precaluculation #
 
-dataframe = pd.read_csv('CSP_data/data_CSP.csv', sep=';')
+dataframe = pd.read_csv('csp_data/data_CSP.csv', sep=';')
 dataframe['Datum'] = pd.to_datetime(dataframe['Datum'])
 
 # parameters for the precalculation
['examples/concentrating_solar_power/csp_collector_plot_example.py', 'examples/concentrating_solar_power/csp_plant_example.py']