Provide the remoteAddress of the connecting client to facilitate IP origin checking.

Remove changes to Build.scala.
Improve remoteAddress substitution for localhost
Don't do localhost substitution, it is not needed
Merge branch 'add_httprequest_headers_to_websocket' into thefactory

Conflicts:
	project/Build.scala
	src/main/scala/com/twitter/finagle/websocket/WebSocketHandler.scala
Version bump to handle API change