Polina Goltsman issue 7

"old:
   Bootstrap Node:  A network node used by Joining Nodes to help locate
      the Admitting Peer.
new:
   Bootstrap Node:  A network node used by Joining Nodes to help
accessing
      the overlay by forwarding messages to peers.

The bootstrap node does not locate the Admitting Peer, but the JN
locates
the AP by routing a message to its own Resource-ID"

- As suggested.