Prepare list of data frames during ALFRESCO post-processing

Prepare list of data frames during post-processing of ALFRESCO fire events from map outputs.

pp_fire_events(alf_data, emp_data, domain, group_name, run_name, emp_yrs,
  out, send_to_app = TRUE)

Arguments

alf_data	output from `fire_events`.
emp_data	output from `fire_events_emp`.
domain	character, ALFRESCO domain.
group_name	character, ALFRESCO run group name.
run_name	character, unique ALFRESCO run name.
emp_yrs	empirical years.
out	character, output directory.
send_to_app	logical, send processed fire event outputs to Shiny app on Eris server. Defaults to `TRUE`.

side effect of reading and writing files.

# not run