move Thelia namespace into core/lib directory

introduce prod / dev environment

core/bootstrap.php

@@ -1,6 +1,21 @@
 <?php
 
+if(!isset($env)){
+    $env = 'prod';
+}
 
+use Symfony\Component\DependencyInjection;
+use Symfony\Component\DependencyInjection\Reference;
+
+
+/**
+ * 
+ * @file 
+ * Functions needed for Thelia bootstrap
+ */
+
+
+$loader = require __DIR__ . '/autoload.php';
 
 
 ?>