Support API resources that don't require authentication
Add initial membership API resource
Support only GET for membership resource
Require Focus in membership API calls
Require all GET parameters
Handle Actor birth_date as date field, not datetime
Implement membership API resource lookup
Include the members' forening in API member data
Include household (parent and children members) in API member data
Include sibling members for household members
Reverse household member semantics
Return data for entire household if specified
Add membership price API resource
Call API resource dynamically
Merge branch 'api'