- remove peer_id from all object tables

- remove peer_id from all object tables
- replace with join tables and augmented views
- set invalid persons.password if not set when inserting
- make person_key.key_id the primary key (only one person per key)
- remove unused node, anonymous, and peer roles (these are virtual roles
  in the API)
- set default events.runtime
- add events.message to view_events
- remove slice_attribute_types and slice_attributes from peer caching