group<< operator: adding (and fixing) specs.

trello: https://trello.com/c/FCPN48wA/648-bei-admins-user-unbedingt-valid-from-setzen
refactoring workflows import task in order to prepare the import of former-members workflows.
workflows: adding definitions for workflows Streichung, Schlichter Austritt, Ehrenhafter Austritt, Dimissio i.p. and Exclusio.
workflows: fix: wrap all workflows in transactions.
worfklows: fix: execute allows parameters.
workflows: mount former-memberships workflows in aktivitas and philisterschaft.

If they are mounted in the corporation, they show up for former members
as well.
former-meber workflows: destroy user accounts and remove from groups

trello:
https://trello.com/c/WlNlsXyF/340-workflows-verstorbene-ehemalige
workflows: wrapping workflows in database transactions by updating the gem.

trello: https://trello.com/c/WlNlsXyF/340-workflows-verstorbene-ehemalige
workflows: changing the icon for former-meber workflows.
BV-Zuordnung ergänzen und korrigieren.

UserVoice: https://wingolf.uservoice.com/admin/tickets/94
Trello: https://trello.com/c/VCeC7ne5/586-fehlende-bv-zuordnungen
BVs: Überprüfung und Korrektur von Philister-BV-Mitgliedschaften anhand der Postanschrift.
BV: Zuordnungen anhand Vademecum Wingolfiticum 2005 und 2012 anpassen.

Trello: https://trello.com/c/VCeC7ne5/586-fehlende-bv-zuordnungen
BV: Im Moment keine automatische Neu-Zuordnung durchführen, da es Philister mit Wunsch-BV gibt.

Trello: https://trello.com/c/VCeC7ne5/586-fehlende-bv-zuordnungen
csv: using caching to create birthday list.
csv: handling Feb-29 case when exporting birthday list.
csv: adding bv to birthday table.
csv: caching User#bv
csv: using cached bv in birthday list.

this only a temporary solution. we'll remove the bv from the list again.
csv: revert csv column in birthday list.

this has to be in wingolfsplattform rather than your_platform.
new users (Aktivmeldung): assign user to the first status group of a corporation rather than to just the group called 'Hospitanten'. There are corporations that call that group differently.