make is_weekly and has_biweekly db fields instead of calculated properties - more efficient
update all members for one import to set the is_weekly and has_biweekly in db
oops
have to init is_weekly through separate request
reduce # of queries done during export
show # of members still without workshifts on the workshifts page
change the export rows for MailChimp so that we have the primary's information in both primary and secondary rows
this is filling up the db - need to fix or remove
should be working for normal shares, still need to update for meat, cheese, P&P