It better manage the transition from the old internal storage format to using the new implementation of the external JSON structure for storage, the storage format should be configurable so we can a) deploy new code without changing the storage format and b) revert to the old format in case somethign goes wrong when using the new format.

Version: unspecified
Severity: critical
Whiteboard: u=dev c=backend p=3 s=2014-06-17