GitLab

Add configuration options for ignoring freezing, listening for adds & removes

Add ability to listen for peers getting added and removed from peer request queue

Add an option to ignore freezing when removing tasks, as well as a configuration infrastructure

Copy over changes from go-bitswap to insure peer trackers are cleaned up when idle

Implements functionality common to graphsync and bitswap, extract

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