[btcsuite/btcd] 6c00d0: peer: Combine stats struct into peer struct.

[Dave Collins]

  Branch: refs/heads/master
  Home:   https://github.com/btcsuite/btcd
  Commit: 6c00d079106efe16ec825c4fd6de9a87ba51b415
      
https://github.com/btcsuite/btcd/commit/6c00d079106efe16ec825c4fd6de9a87ba51b415
  Author: Dave Collins <da...@conformal.com>
  Date:   2015-11-23 (Mon, 23 Nov 2015)

  Changed paths:
    M peer/peer.go

  Log Message:
  -----------
  peer: Combine stats struct into peer struct.

This defines the peer stat fields directly in the Peer struct instead of
defining them in a separate struct and embedding them.  It is slightly
more efficient this way and there is really no reason to have them
defined separately anyways since they are not passed around or otherwise
used independently.