APCu and OPcache support added

Apc is not available for PHP 5.5 as [OPcache](http://php.net/manual/en/book.opcache.php) is included by default. However there is an alternative for apc user cache: [APCu](https://github.com/krakjoe/apcu). Although APCu functions are backward compatible `apc_clear_cache` doesn't accept any parameters as it only handles the user cache.

Modified the script template for both APCu user cache and PHP 5.5 default OPcache support.