Factor out addresses into their own model

Addresses could be stored as a complex data type with correct validation.

mentioned in commit 30d2455a

added workflow::discussing label

changed due date to January 24, 2020

removed due date

assigned to @nik

changed milestone to %2.0a1

added workflow::confirmed label and removed workflow::discussing label

Decision by dev meeting: Do so.

changed milestone to %2.0a2

unassigned @nik

added workflow::confirmed label

changed title from Complex data types for addresses and phone numbers to Complex data types for addresses

changed the description

assigned to @debdolph

added part::backend prio::2 type::feature labels

removed milestone

removed milestone

unassigned @debdolph

This should be done now for the 4.x series, because it is a breaking change.

changed title from Complex data types for addresses to Factor out addresses into their own model

assigned to @lukasw

There should be address types (as an own model); and it should be possible to link multiple addresses to a person

created branch 8-factor-out-addresses-into-their-own-model to address this issue

mentioned in merge request !1329

added part::frontend label

added core-4.0 label

added prio::1 label and removed prio::2 label

added workflow::current-todo label and removed prio::1 label

Dev meeting decided that @lukasw is going to make an appointment with @ZugBahnHof.

assigned to @yuha and unassigned @lukasw

mentioned in issue #1212