public static function getGitHash($forceCheck = false) {
		if(self::$git_hash && !$forceCheck)
			return self::$git_hash;

		self::$git_hash = "ffffff";

		if(file_exists("dachi_git_hash"))
			self::$git_hash = trim(file_get_contents("dachi_git_hash"));

		return self::$git_hash;
	}