Minor catchup#13

Open

swaldman3 wants to merge 2 commits intopwcazenave:devfrom

Commits on Oct 10, 2019

Let calc_layer_depths take node rather than element numbers if requested.
Simon Waldman
committed

Commits on Jul 16, 2020

Times2Datetime.m: better way of checking which format to use.
swaldman3
committed