Fix: remove Content column from output, because of the extra commas make it hard to read the files in.

adding function to set test outdir as an environemnt variable - so you can change the default location, which is hard-coded

making multi-year mode work

results_by_site_series
pairings_by_site_series
pairings_by_site_series_all
results_by_site_series

to use less memory

extracting functions to allow the ews job dir and the config dict to be created without needing to run the pipeline - allows epi fitting to retrieve these values if the peipeline has already run