output file suffix.

is equivalent to "exported" column)

that are imported. Unknowns file not created if no unknown/uncat columns

refactors.

less confusing.

calculation

with --import_all and --variable/--category (instead of having the union of
--column, --category, and --variable). Move unknonw vars file export to
separate function.

refactorings to remove assumptions of single-column index

on import - not sure why it was happening here? Perhaps it was once upon a
time

not doing a big rum

expressions can be evaluated in parallel.

--num_jobs is set to 1.

copied to child processes at fork.

manually casting/coercing it all. Not implemented yet

on each variable

to icd10DescriptionFromCode

file. Used in fmrib config