add hash increment by to store
Add cohort models.
Basic cohort crud.
Implement multi get
Add data methods for cohort.
Add chart model
Save should return true
Small up the uid generator.
Extract hid generation into own class
Refactor charts into their own objects.
Factor hour chartable into module for composition.
Refactor cohort data into own class
Add participants chart to cohort
Update data uid generator to consider possible cohorts.
Spike to add cohorts to metrics. Going to refactor this shortly.
UI to add cohorts to metrics
Refactor GroupMetric and CohortMetric out of Metric.
Merge pull request #1 from goldstar/cohorts

Cohorts