* Refactor downloads to use download role directly
Also disable fact delegation so download delegate works acros OSes.
* clean up bools and ansible_os_family conditionals
This should make things a little more composable,
by making these roles meta roles that perform no
actions by default we allow each role to own its own
resources.
Maxime Guyot
Matthew Mosesohn
Aivars Sterns
Brad Beam
Bogdan Dobrelya
Paul Czarkowski