ooici/ion-definitions — pull request #506 by pkediyal (2014-03-03 11:50:34+00:00)
Title: CIDEVSTC-194 : add TypeVersion decorator and persisted_version

needs to go in before related pull in pyon

tests and testing procedure described here but only effective after pyon pull request
https://confluence.oceanobservatories.org/display/CIDev/M156+Schema+Versioning