* Kademlia high-level rework
* Some changes in the rework
* Some additional tweaks to kad rework
* Add update_kbuckets
* Rename a bunch of Kademlia stuff
* Add KadSystem::local_peer_id
* Some documentation update
* Concern
* Make the example compile
* Make things nicer
* Fix bug in UniqueConnec
* Add clear() to UniqueConnec
* Add UniqueConnec::poll
* Fix potential deadlock in UniqueConnec
* Add UniqueConnec::state()
* The future of get now contains a Weak
* Fix concerns