now works browserify, considering publishing to npm

.npmignore

@@ -0,0 +1,3 @@
+.testling_env.sh
+bin/.testling_env.sh
+tests

lib/index.js

@@ -1,5 +1,5 @@
 // Public object
-SockJS = (function(){
+var SockJS = (function(){
               var _document = document;
               var _window = window;
               var utils = {};
@@ -35,3 +35,7 @@ if ('_sockjs_onload' in window) setTimeout(_sockjs_onload, 1);
 if (typeof define === 'function' && define.amd) {
     define('sockjs', [], function(){return SockJS;});
 }
+
+if (typeof module === 'object' && module && module.exports) {
+    module.exports = SockJS;
+}

lib/sockjs.js

@@ -7,6 +7,11 @@
  */
 
 var SockJS = function(url, dep_protocols_whitelist, options) {
+    if (this === window) {
+        // makes `new` optional
+        return new SockJS(url, dep_protocols_whitelist, options);
+    }
+
     var that = this, protocols_whitelist;
     that._options = {devel: false, debug: false, protocols_whitelist: [],
                      info: undefined, rtt: undefined};

package.json

@@ -14,5 +14,5 @@
         "optparse"      : "1.0.3",
         "node-static"   : "0.5.9"
     },
-    "private": true
+    "main": "sockjs.js"
 }