Merge pull request #60 from dimagi/longstanding-errors

make get_related_prop work
fix corner case for when a group has no owner_ids
Merge pull request #61 from dimagi/fix-corner-case

fix corner case for when a group has no owner_ids
initial draft of due list
delete dead file
add classes for various days of the due list schedule
Merge pull request #62 from dimagi/due-list

initial draft of due list
Merge branch 'master' into danny

Conflicts:
	bihar/reports/indicators/reports.py