PHP 7 Support

Would you please update the class structure so that PHP 7 is supported?

1. Rename BBCode to Deluxe_BBCode
2. Change all function to public function
3. Open bbcode-deluxe and instantiate the class with the Deluxe_BBCode name.

This will allow the plugin to activate with PHP 7.

Hope this helps.

https://ww.wp.xz.cn/plugins/bbcode-deluxe/