Better autoload for required files

Add autoload function to main config file.
Add better DIR declarations in config file based on __DIR__ for libs &
smarty classes.
Load all class files with the new autoload function in header & direct
file calls.

www/libs/Class.DB.Array.IO.inc

@@ -39,12 +39,7 @@
 	// put into separete function in this class)
 
 	// try to include file from LIBS path, or from normal path
-	$include_file = 'Class.DB.IO.inc';
-	foreach (array('', LIBS, __DIR__.'/') as $folder)
-	{
-		if (file_exists($folder.$include_file))
-			require_once($folder.$include_file);
-	}
+	_spl_autoload('Class.DB.IO.inc');
 
 	// subclass for one array handling
 	class db_array_io extends db_io