move Thelia namespace into core/lib directory

introduce prod / dev environment

core/lib/Thelia/Autoload/TheliaApcUniversalClassLoader.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Thelia\Autoload;
+
+class TheliaApcUniversalClassLoader extends TheliaUniversalClassLoader {
+    
+    private $prefix;
+    
+    /**
+     * Constructor
+     * 
+     * Come from Symfony\Component\ClassLoader\ApcUniversalClassLoader
+     * 
+     * @param string $prefix
+     * @throws \RuntimeException
+     */
+    public function __construct($prefix) {
+        if (!extension_loaded('apc')) {
+            throw new \RuntimeException('Unable to use ApcUniversalClassLoader as APC is not enabled.');
+        }
+
+        $this->prefix = $prefix;
+    }
+    
+    
+    /**
+     * Finds a file by class name while caching lookups to APC.
+     * 
+     * Come from Symfony\Component\ClassLoader\ApcUneiversalClassLoader
+     *
+     * @param string $class A class name to resolve to file
+     *
+     * @return string|null The path, if found
+     */
+    public function findFile($class) {
+        if (false === $file = apc_fetch($this->prefix.$class)) {
+            apc_store($this->prefix.$class, $file = parent::findFile($class));
+        }
+
+        return $file;
+    }
+}
+?>