wip specs
Create membership associations (has many through)
Incorporate new associations into controller
create join and leave methods
extract join/leave buttons into form partials
Clean up/remove unnecessary code
Change how group_id is found based on membership
Make association work
Finish member_of? method & edit others
Change how groups are edited
Fix how group is found in memberships controller
Implement leave function
Change has_group to account for new association
Clean up code/delete lines
WIP Change how group is related to student
remove unnecessary code
Use member_of for helper methods
Have member_of return boolean
extract coach/student group list into partial
make tests pass