Munkitools2

Here's a Munki 2 recipe I'm posting for review. Since it's now a flat distribution pkg, we unpack the pkg, re-flatten each component pkg and use the same pattern for importing and dependencies as with the original munkitools recipe.

It still defaults to a release version, so there's a note in the recipe about it expecting an override for the latest auto-build URL.

I can run this with:

`autopkg run -v -k DOWNLOAD_URL=https://munkibuilds.org/munkitools2-latest.pkg munkitools2.munki`