Merge branch 'deif-add-mail-translations' into deploy
Merge branch 'deif-add-description-to-reservation' into deploy

Conflicts:
	seantis/reservation/locales/de/LC_MESSAGES/seantis.reservation.po
	seantis/reservation/locales/fr/LC_MESSAGES/seantis.reservation.po
	seantis/reservation/locales/seantis.reservation.pot
Merge branch 'deif-add-mail-translations' into deploy
Notify when reservation slots are removed.
Use ordered timespans to prevent data separation.
Merge remote-tracking branch 'origin/deif-add-slots-removed-event'

Conflicts:
	seantis/reservation/locales/de/LC_MESSAGES/seantis.reservation.po
	seantis/reservation/locales/fr/LC_MESSAGES/seantis.reservation.po
	seantis/reservation/locales/seantis.reservation.pot