- change all ISO timestamp strings to unix timestamps
- add patch_incident and new_stage
- streaming: remove INC_UPDATE_STAGE
- manager: change primary key on instance_stages table
This requires a table change across all elstat instances, since
we changed the primary key on instance_stages.
- streaming: add sub/unsub OP codes, changing from the old behavior of
just giving a channels array.
- streaming: properly check payloads against their data and send
proper errors.
- manager: add unsubscribe()