temporary work on withdrawing from a task
Merge branch 'release/booking-sprint-7' into feature/BOOK-576-withdraw
added integration test, ember controller, ember view, and serializer permissions for withdraw functionality
Update permissions.py
Update permissions.py
make taskmember serialzier extendable
added func for template in controller
language fix
contr update
mail msg updates and fix for issue 573
revmoed duplicate key in email
test fix
Merge pull request #582 from onepercentclub/feature/BOOK-576-withdraw

Feature/book 576 withdraw
Merge pull request #585 from onepercentclub/feature/BOOK-575

Feature/book 575
Merge branch 'release/booking-sprint-7' into feature/BOOK-558
added missing migration for edit_viewable in project phase