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.

This configuration works with EWS-EpiModel git commit 631e3520. This can handle multiple diseases but only one region. Output directories are <job-directory>/<region>/<disease>/<output>

which also includes development to handle input from kobotoolbox survey forms.
And also points to the generalised wheat-source-generation directory.