A collection of tokens we've been asked to do at various points,
includes:
- today's date
- name of other contact in a relationship (this gives the name of one persion with x relationship to the given contact - only in a->b direction - useful for getting spouse's name if you know there will only ever be one)
- expiry date of current membership (if exists) - will retrieve the membership that finishes latest
- address block - formatted like mailing labels - for window envelope letters. Also capitalises the country and omits it if same as domain country. Uses per-country formatting if configured