Merge branch '10-buffer-logging-emails-and-send-at-end-of-script-or-hit-an-uncaught-exception' into 'master'

adding new bufferingSMTPHandler for Jake to consider

Closes #10

See merge request gilligan-epid/wheat-rusts/ews-coordinator!2

10-buffer-logging-emails-and-send-at-end-of-script-or-hit-an-uncaught-exception-2

To match EWS-advisory-builder commit 92edec8.

Needed for historical calculations over forecasts where the output formatting changed slightly.

For current (py3EWS) and last (py3EWSepi-legacy) version.

The newly imported AdvisoryBuilder can be run separately, see
that project for more details.
Updated conda environment accordingly.

There is a fudge to iterate over diseases, which should be improved.