Adds NG states to php-formula

This rather big pull requests adds NG states to the php formula much in the same way we did with NGINX. It does require the helium release (or an updated pillar module) in order to take advantage of `salt.modules.pillar.get(merge=True)`.
I completely understand any hesitation. A macro is more explicit, even if it's several lines longer. If there's a negative reaction, I could always rewrite it as a macro. Jinja imports are obviously good for the pattern, includes, however, hadn't really been tried/discussed. Thought I'd give them a look. All-said, this particular set of states are so bare-bones it makes me wish I had some type of state-router with a single real state. As it is, though, the benefits do not likely get anywhere near the costs.