function accepts a list of take vids, and will pair them up with the main
vids

Bf/fmribtimes

See merge request fsl/funpack!62

Rf/date norm in cleaning

See merge request fsl/funpack!61

functions, as it makes more sense to apply them early, rather than at export.

RF: Re-work DataTable.merge - now merges multiple subtables in one go, with

See merge request fsl/funpack!60

appropriate checks/skips. Hopefully best performance.

Rf/subtable merge perf

See merge request fsl/funpack!59

instead of drop+concat. Also only consider columns that have been modified,
and no-op if no columns have changed.