feat: add previous period hash to proofs and roots if present#166

Merged

troggy merged 4 commits intomasterfrom addPrevPeriodToProofs

Dec 23, 2019

+201-45

Commits on Dec 17, 2019

Add previous period to proofs and roots if present.
Jan
committed

Commits on Dec 20, 2019

Add ability to produce and verify prevPeriod proofs. Also fix tests and fix backwards compatibility issue.
Jan
committed

Commits on Dec 23, 2019