add special date subrecords to agents and to names
frontend forms for date subrecords on agents and names
Merge branch 'master' into 45076989-agent-dates
add two new labels to date_label enum
add a helper option to screen out select values
add templates_override param to the shared subform
create template overrides for date labels in agent context
update agent and agent name forms to include new date fields
add new date subrecords to read only views
add json validations for agent date labels
split up date template for different contexts
selenium test for dates of existence
Fix backend test now agent date requires a certain type 'existence'; Remove some debugging and added some missing i18ns;
Merge pull request #479 from hudmol/45076989-agent-dates

45076989 agent dates