Extract merkledag package, move dagutils to top level#5298

Merged

whyrusleeping merged 2 commits intomasterfrom feat/extract-dagservice

Jul 29, 2018

+87-4,125

Commits on Jul 28, 2018

move dagutils package to top level in preparation for merkledag extraction
whyrusleeping
committed
Extract dagservice, move dagutils to top level
whyrusleeping
committed