Rename "roles" to "units". Put units in their own folders.

lib/units/websocket/middleware/cookie-session.js

@@ -0,0 +1,10 @@
+var cookieSession = require('cookie-session')
+
+module.exports = function(options) {
+  var session = cookieSession(options)
+  return function(socket, next) {
+    var req = socket.request
+      , res = Object.create(null)
+    session(req, res, next)
+  }
+}