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

lib/units/websocket/middleware/remote-ip.js

@@ -0,0 +1,9 @@
+var proxyaddr = require('proxy-addr')
+
+module.exports = function(options) {
+  return function(socket, next) {
+    var req = socket.request
+    req.ip = proxyaddr(req, options.trust)
+    next()
+  }
+}