GitLab

Move ResponseProgress to the types package and extract some testing functions to testutil

Make the request manager actually inject responses from the network, and perform a selector
verification

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

Initializes a new top level interface that brings together all the components so far to send a
request across the network

fix #6