use list to construct changeset header, use iterators.  makes creating a changeset file for dev take 0m59.981s versus 3m38.807s
use list to construct changeset header, use iterators.  makes creating a changeset file for dev take 0m59.981s versus 3m38.807s

fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary,fedora-conary/conary