added csrf and updated view to include delete.
whoops, I forgot to add `pass`
delete group added.
reviewed my own code.
contacts should not be removed, removed todo.
wrote tests to test multiple group deletion.
Merge branch 'develop-frontend' into feature/issue-474-delete-contacts-and-groups
Merge branch 'develop-frontend' into feature/issue-474-delete-contacts-and-groups
test for exporting contacts.
Merge branch 'feature/issue-474-delete-contacts-and-groups' into develop-frontend