De-dzilify. This may look odd and borderline revolting - read on

De-dzilify. This may look odd and borderline revolting - read on

Currently available dzil plugins do not offer the dynconfig flexibility
that this module requires. Instead of taking a 2 day course in dzil
internals, I opted for using a tool I know to accomplish the same task.

I have absolutely no problem with someone reverting this commit and re-
doing things in dzil, as long as the resulting Makefile.PL is functionally
equivalent. Some points:

* Dzil's autorequires can't possibly understand what an optional dep is
  This is an easy fix - just specify all deps manually

* There is no plugin for "require list depending on can_cc". Package::Stash
  does something to the effect, but with some sort of hack I am not entirely
  capable of comprehending

* There is no plugin to "require list depending on smoking env", nor there
  is an easy mechanism (that I see) of combining it with the above