* No longer panic when updating self peer ID in kbuckets
* Minor code improvement in flush()
* Small improvement to handle_find_node_req
* expected_pongs no longer mut
* Clean up KadServerInterface trait
* find_node() returns an impl Future
* Rework kad_server's API to remove the interface
* Remove the error mapping in kad_bistream.split()
* Use a name type in protocol.rs
* respond() now takes an iter of Peers + add tests
* Use concrete Future type in kad_server upgrade
* Let the high level code decide the TTL of the addrs
* Replace QueryInterface::send with find_node_rpc
* Replace KademliaProcessingFuture with KademliaPeerReqStream
* requested_peers() now returns an iter
* gen_random_id() only requires &PeerId
* Remove QueryInterface and return stream of events
* Remove add_peer_addrs from query
* Remove the peer_store and record_store params
* Tweak multiaddresses reportin
* Remove dependency on peerstore
* Fix tests
