Character path indicating the target folder in which to store log
information. Defaults to the temporary directory if not specified. Default logging
can be disabled if logs is set to NULL. If specifying a custom logging setup then
the code for setup_default_logging and the setup_logging function are a sensible
place to start.
mirror_epinow
Logical, defaults to FALSE. Should internal logging be
returned from epinow to the console.
target_date
Date, defaults to maximum found in the data if not specified.