implement MerkleRoot
implement MerkleRoot

mharkus/Sia,mtlynch/Sia,ericflo/Sia,mtlynch/Sia,ericflo/Sia,NebulousLabs/Sia,Mingling94/Sia,mharkus/Sia,ChrisSchinnerl/Sia,mnsl/Sia,rivine/rivine,ChrisSchinnerl/Sia,rivine/rivine,NebulousLabs/Sia,mnsl/Sia,MrStrong/Sia,johnathanhowell/Sia,kustomzone/Sia,MrStrong/Sia,cyrozap/Sia