ENH: Option to ignore redundancy check for uncategorised/unknown columns
The removeIfRedundant processing function has a new skipUknowns option - if column A is found to be redundant w.r.t. column B, and column B is unknown or uncategorised, column A will not be dropped.
Various small tweaks and adjustments to cope with behavioural changes in pandas 1.3.x, and to avoid / suppress various warnings.
Small adjustments to FMRIB categories and configuration.