public static function get_build()
	{
		$root = dirname(dirname(__FILE__));
		if (file_exists($root . '/.git/index'))
		{
			return filemtime($root . '/.git/index');
		}
		elseif (file_exists($root . '/SimplePie'))
		{
			$time = 0;
			foreach (glob($root . '/SimplePie/*.php') as $file)
			{
				if (($mtime = filemtime($file)) > $time)
				{
					$time = $mtime;
				}
			}
			return $time;
		}
		elseif (file_exists(dirname(__FILE__) . '/Core.php'))
		{
			return filemtime(dirname(__FILE__) . '/Core.php');
		}

		return filemtime(__FILE__);
	}