Revert "Go back to downloading all"

This reverts commit 88a5daed65.

py/downkwh.py

 # import matplotlib.pyplot as plt
 # import seaborn as sns
 
-kwhdata = getkwh('2017-01-01', '2018-01-01', '2017-01-01 00:30:00', '2018-01-01 00:00:00', '%%1')
+kwhdata = getkwh('2017-01-01', '2017-02-01', '2017-01-01 00:30:00', '2017-02-01 00:00:00', '%%1')
 
 print(kwhdata.info())
 
 print("Pickling")
-kwhdata.to_pickle("../data/2017-all.pkl")
+kwhdata.to_pickle("../data/2017-Jan-all.pkl")