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Creates the Response Manager that processes incoming requests, initiates selector traversal, and
generates responses

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

Create a loader that wraps the underlying store loader and sends to network

Create a response manager for a single peer to handle assembling and managing responses for a given
peer

add a response builder that collects components of a response and then assembles a completed
response message

Create a link tracker that helps dedup block sends and also track if blocks are missing from
requests

Create a prioritized task queue for tracking blocks of tasks between peers