set up for making groups
make index action with authorization
add serializer for groups
add users to returned json with groups
unauthorized users cannot create groups
add validation and authorization to new group creation
implement admins and members for groups
signed in users can not delete groups
only admins can destroy groups
add dependent: :nullify for groups, not currently working
signed in resident becomes admin of any new group
add admin to serializer for group
add test for inclusion of admins in index for groups
refactor group_index tests
start a groups view
clean up styling for mobile-friendly
add join action for groups
add tests for join action on groups
clean up debugging statements
uncomment test