Middleware naming convention

lib/cartodb/middleware/cors.js

@@ -1,11 +1,14 @@
 module.exports = function cors(extraHeaders) {
-    return function(req, res, next) {
+    return function corsMiddleware (req, res, next) {
         var baseHeaders = "X-Requested-With, X-Prototype-Version, X-CSRF-Token";
+
         if(extraHeaders) {
             baseHeaders += ", " + extraHeaders;
         }
+
         res.set("Access-Control-Allow-Origin", "*");
         res.set("Access-Control-Allow-Headers", baseHeaders);
+
         next();
     };
 };