dimagi/commcare-hq — pull request #2159 by snopoke (2013-12-21 20:50:59+00:00)
Title: fix opm fluff

Calculator `group_by` must be same length as IndicatorDoc `group_by` so:

* simplified most common emitter `case_date_group` to just emit date (value is auto set to '1') by moving `group_by` to IndicatorDoc
* similar for OpmUserFluff