First pass at pipelining support in replication
First pass at pipelining support in replication

PattyW/raft_govec,sean-/raft,tempbottle/raft-2,quantiply-fork/raft,hashicorp/raft,wantonsolutions/raft,hashicorp/raft,dgnorton/raft,jmptrader/raft-1,otoolep/raft