I've now made a hard-coded list of potential tags that are supported and
will be linked to in the general ledger spreadsheet. This list should
probably be in a configuration file of some sort eventually, rather than
hard coded.
Indeed, note that the hard-coding goes into two different scripts, and
thus the lists could easily get out of sync.
Change the column of Receipt and Invoice in the CSV file first, then the
generated ODS file must have the same change propagated, which requires
changes to the column numbers hard-coding in csv2ods.py.
Perhaps if/when this application is refactored these things shouldn't be
hard-coded in this way in the first place.
