Merkle proof library with tests and docs#260

Merged

frangio merged 7 commits intoOpenZeppelin:masterfrom

yondonfu:feature/merkleproof

Sep 18, 2017

Commits on Jun 14, 2017

MerkleProof library and initial stubbed out tests
yondonfu
committed

Commits on Jun 15, 2017

Commits on Jul 28, 2017

Check proof length multiple of 32. Use keccak256 instead of sha3
yondonfu
committed

Commits on Aug 7, 2017

MerkleTree util class hashes elements
yondonfu
committed

Commits on Sep 18, 2017

Merge branch 'master' into feature/merkleproof
yondonfu
authored