projecttacoma/simplexml_parser — pull request #23 by jtferns (2014-12-10 15:08:28+00:00)
Title: Detect and handle unstratified populations after parsing population criteria

### Story ###
- https://www.pivotaltracker.com/story/show/83702362

### Notes ###
- parse out populations as an array of keys based on population code values
- generate missing population hashes