add get_by_location and a note about using it
add reconcile_ownership function + tests
when a user's supply point is set, also make them an owner of the case

(and all subcases)
i should proofread better
minor optimization - don't duplicately add groups to list
fix test import for tests
refactor assign_case function
Merge pull request #1038 from dimagi/commtrack-user-workflow

when a user's supply point is set, also make them an owner of the case