GitLab

* feat(notifications): build notifications architecture

build an architecture via which we can pass on notifications

* feat(peerresponsesender): add notifications

pass notifications on from peer response sender based on message queue notifications

* feat(responsemanager): handle network errors

Pass on network errors through the response manager, pass block sent errors as well

* fix(notifications): send unique notifications by peer

* feat(responsemanager): subscriber per request

* Revert "fix(notifications): send unique notifications by peer"

This reverts commit 7bf368a05d14229b7523cb25068681d9c7e48246.

* style(imports): fix import formatting

Fix import formatting via script. Also add script for import fixes and release log

* docs(CHANGELOG): add changelog, contributing

Add the changelog and a contributing guidelines doc

Adds callbacks to manage connections, also removes network receiver methods from public graphsync
interface, and updates libp2p to handle go-libp2p-core refactor

Complete functionality to initialize response manager and process incoming requests

fix #7, fix #8

Refactor peer manager to handle abstract processes, then use the base class for the peer message
manager and the peer response manager