Fix 1.9.4.0 merge issues (#602)

* lib/mcrypt_compat/ should be lib/mcryptcompat/
* add missing lib/phpseclib/PHP/ folder

refs: #580

Author: edannenberg

app/Mage.php

@@ -47,7 +47,7 @@
 Varien_Autoload::register();
 
 include_once "phpseclib/bootstrap.php";
-include_once "mcrypt_compat/mcrypt.php";
+include_once "mcryptcompat/mcrypt.php";
 
 /* Support additional includes, such as composer's vendor/autoload.php files */
 foreach (glob(BP . DS . 'app' . DS . 'etc' . DS . 'includes' . DS . '*.php') as $path) {