Updated twitter twitter_pi.php detail

Changed 'latest' date for twitter async

README.md

@@ -37,7 +37,7 @@ login / logout / admin stuff thats always required.
 
 * [recaptcha_pi.php](http://code.google.com/p/recaptcha/) - recaptcha-php-1.11
 * [facebook_pi.php](https://github.com/facebook/facebook-php-sdk/) - v.3.2.2 
-* [twitter_pi.php](https://github.com/jmathai/twitter-async) - Updated to latest release - [Jun 21, 2013](https://github.com/jmathai/twitter-async/commits/master)  
+* [twitter_pi.php](https://github.com/jmathai/twitter-async) - Updated to latest release - [Jan 07, 2014](https://github.com/jmathai/twitter-async/commits/master)  
 * [phpass_pi.php](http://www.openwall.com/phpass/) - Version 0.3 / genuine _(latest)_ 
 * [openid_pi.php](http://sourcecookbook.com/en/recipes/60/janrain-s-php-openid-library-fixed-for-php-5-3-and-how-i-did-it) - php-openid-php5.3  
 * [gravatar.php](https://github.com/rsmarshall/Codeigniter-Gravatar) - codeigniter (6/25/2012) rls