daily-lasso: fill missing range data with NaNs
This merge request patches a failure mode in daily-lasso
by filling any missing BNS SenseMon range data with NaNs. This was used to fix a problem in production, see the output page for 2020-04-30.
N.B. this also alphabetizes and very slightly re-organizes imports, and now imports numpy as a whole.
This fixes #4 (closed)
Edited by Alexander Urban