Add requirejs module support

Fixes #10.

readme.md

@@ -75,6 +75,17 @@ Extract detailed type of web browser, layout engine, operating system, and devic
 </script>
 ```
 
+## Using requirejs
+
+If you're using requirejs, you can load UA-Parser like any other module.
+
+```js
+require(['ua-parser'], function(UAParser) {
+    var parser = new UAParser();
+    console.log(parser.getResult());
+});
+```
+
 ## Using node.js
 
 ```sh

ua-parser.js

@@ -417,6 +417,11 @@
             exports = module.exports = UAParser;
         }
         exports.UAParser = UAParser;
+    } else if (typeof define === 'function' && define.amd) {
+        // requirejs env
+        define(function() {
+            return UAParser;
+        });
     } else {
         // browser env
         global.UAParser = UAParser;