v0.8.1

Stability improvements.

Changed

• Rebroadcast the session along with every action over pubsub
• Allow actions with missing parents to be applied if history indexing is off
• Change app.connections to a mapping of PeerIDs to detailed information about the peer, including connection status and whether that peer is subscribed to the application topic
• Ping peers to detect if we have a valid connection
• Maintain app.status which tracks if there is at least one online connection, subscribed to the application topic