Since this is a change to the table schema for all services using the
ping adapter, you will have to delete the tables relating to them.
- elstat.blueprints: add incidents blueprint (WIP)
- elstat.blueprints: add decorators.py
- elstat.blueprints: add errors.py
- elstat.manager: add incidents & incident_stages tables
- run: add handler for ApiError
- 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()