add ioncube lwrp + move install process to ::install recipe

This shuffles things around and changes the behavior of the recipe a bit... ::default now just includes the PHP recipe, leaving it up to you to invoke the LWRP yourself, so you can set notifications.

The ::install recipe will also invoke the LWRP for you to install ioncube with no notifications.

Notifications will only work with Chef 11--Chef < 11, resources defined in providers cannot notify top level resources.