work in progress, avoid using writable nested serializers
Merge branch 'develop' into donate-urls-refactor
add links to user profile and edit profile in menu
basic info + volunteer activity info on user profile pages
add organization basic serializer
Merge branch 'develop' into donate-urls-refactor
nested volunteer activity serializer for users and orgs
show users for organizations and organizations for users in api
basic info for organization + volunteer activities
empty data template for orgs that have no volunteer activities
show organizations on user profile page