* Add chequebook/balance  &  /chequebook/address debug api endpoints
* Basic unit tests

* move pipeline components to individual packages

* kademlia: wait for peers to be added to the backing data structure

Safety checks in accounting
Correct restoring balance after unsuccessful payment
Added code comments for arithmetic safety related parts
Co-authored-by: Pavle Batuta <pavle@batuta.xyz>

* add pss websocket api for opening a persistent connection for incoming messages on a given topic
* add pss message send api to send outgoing messages

* trojan,pss: optimise trojan mining
 - introduce context to Wrap and eliminate MinerTimeout
 - simplify Wrap
 - add mine function that finds a nonce that makes a function true
 - introduce mining benchmarks

* trojan: redo mine function to work with chunk not interface

This reverts commit c9bb6556.

* add clef as an external signer
* adjust signing in memory

Broad-spectrum refactor of the resolver package.

- removed TLD constraints (all TLDs are now accepted)
- merged resolver service into multiresolver
- simplified client code
- refactored tests
- added MultiError
- other minor fixes

* add opentracing instrumentation to http package

- blocklisting in p2p layer and libp2p implementation

* bump bee version to 0.3.0

Remove old version of go-ethereum.

Remove connect notify from p2p interfac

Break at 3 bootnodes

* Add individual tags persistence