FIX: Removed some examples from util funtion docstrings which did not really correspond to the functions.
FIX: Removed some examples from util funtion docstrings which did not really correspond to the functions.

That was the case for mean_over_time_windows and average_over_time_windows.

Also remove some blank lines from otehr examples in util.

By the way, these timeseries functions are a mess and I really need to clean them up.
Remainders from "No Pull Request" times...

kmuehlbauer/wradlib,wradlib/wradlib,heistermann/wradlib,wradlib/wradlib,kmuehlbauer/wradlib,heistermann/wradlib