Minor changes

Moved config into $GLOBALS
Moved request_uri into $GLOBALS
Modified all files accordingly
Modified logout page for future improvements (not deleting the entire $_SESSION)
Fixed LICENSEs, moved LICENSE for PHP files in /lib/php subfolder instead of /lib

lib/php/logout.php

@@ -1,5 +1,3 @@
 <?php
-    $_SESSION = array ( );
-    session_destroy ( );
+    $_SESSION [ 'user_id' ] = NULL;
     header ( "Location: " . substr ( $_SERVER [ 'SCRIPT_NAME' ], 0, -10 ) . "/" );
-?>