removing update
renaming lookup to read and insert to write
adding staleness to node
adding check_heartbeats to node list to return all stale nodes
building a node id/heartbeat value map to be stored with each write
adding a store entry class to help satisfy last write wins
converting the store to use the store entry class
fixing behavior of get_all in store
adding consistency levels
adding consistency levels to shells
adding consistency levels to the router and removing key transfer (for now)
pulling key routing as-is into a new class for modification
converting router to use new key router class
renaming route_key to route_to_master
key routing for all consistency levels is working
splitting router into a reader/writer/performer, adding new message types, simplifying server and client shells, etc
adding a 10 item history class
implementing the performer class and most of the client shell
adding history and the show command
serious clean up of performer