Allow for adding modifying types of subjects

every type should have separate follow-up visit creation schema

added enhancement label

changed milestone to %1.1.0~alpha.0

created merge request !305 (merged) to address this issue

mentioned in merge request !305 (merged)

closed with merge request !305 (merged)

mentioned in commit d15d9c8d

mentioned in merge request !365 (merged)

mentioned in issue #302 (closed)