Send new peers piece requests on connect #179
Description
Lets say have already started the torrenting process; we already have our initial peers and our first few pieces. What happens when a new peer connects to us, and we're still waiting on other peers to send us our last piece request. This situation happens quite often actually and if the previous peers just ignore us, we're left at a hard stop. We stop receiving and sending data as the piece request-response loop has stopped. This, obviously needs to change. How would we fix this? Once we connect a peer fully (probably inside the append_peer function) and create its PeerActor, we should send it a piece request for our latest block/piece.
This should probably be done after #178, since the peer may choke us upon connection and that would defeat the whole purpose of this.