(doc) README updates.
(feat) Updated chain to be 2x faster.
(doc) Updated README to include new benchmarks.
Merge pull request #83 from reem/feat/chain-update

(feat) Updated chain to be 2x faster.
Merge pull request #84 from reem/doc/readme-benchmarks

(doc) Updated README to include new benchmarks.
(fix) Switched back to upstream dependencies.