Peer socket refactor

[AdamMagaluk]

1. Removed peer setup logic out of http_server and all into peer_socket.
2. Cleaned up http_servers use of .router/.peers/.agents to only use .peers[<peer_name>]
3. Removed server's id, urls now use server's name. Note: there is still a .id on zetta which is set to the name for now.
   3.a peer_registry uses id which is set to the peers name when in the perspective of a cloud server.
   3.b peer_registry uses a v4 uuid for a id key for peers in the perspective of a local server.
4. peer_socket now has property called .name which is the server name, event_broker updated to use this.

[kevinswiber]

There's a lot here. Still going through it. Related to the name change, we should alter the server API response so it doesn't include the id in the properties. We also need to make sure server names are URI-encoded for the representations.

[kevinswiber]

(For URLs in representations, that is.)

[kevinswiber]

Pending the above changes, this looks good to merge!