Rename average.py to average_mean.py (#939)

'average.py' is ambiguous. There are several kinds of averages, so 'average_mean.py' is a more precise name.
This commit is contained in:
PatOnTheBack 2019-07-10 01:21:04 -04:00 committed by cclauss
parent e6eaa078e2
commit add1aef064