Multi docker

*** This is what I've got so far. I'm not meaning for this to be merged quite yet. I still need some rpm testing. (iterations are long) also pining @mrtyler. I'm mostly just sharing what I have so far.

But this does work. Obviously the makefile has exploded. Certainly with more makefile-foo this could be macro'd away into oblivion, but I would like to commit this as working first, and then twiddle because you can use the itest to be sure it still works.

This does add yelpism, because for itests we want to make sure it works against *our* images. Also there is no official hardy images?

Comments welcome. There is certainly lots of DRY to do in the itest section if you want. 

The hanging you were experiencing has something to do with the fakeroot + bundle + fpm execing. Let me run some more tests to ensure reproduceability.