support for joining and leaving date, default data fields for attendees

[confetti] / constants.sh

#!/bin/zsh

VCF_FIELDS=(PHOTO LOGO FN NICKNAME SOUND GENDER KIND TITLE ROLE ORG MEMBER CATEGORIES ANNIVERSARY BDAY EMAIL TEL IMPP ADR URL LANG NOTE RELATED X-ZACK-JOINDATE X-ZACK-LEAVEDATE)