code: function create_message(req, data) {
  		debug.assert(data).is('object');
  		if(!is.uuid(data.$id)) {
  			data.$id = require('node-uuid').v4();
  		}
  		req.session.client.messages[data.$id] = data;
  	}
docs: Add a message
  @fixme This code should be from session.js somehow