Merge pull request livepeer#1359 from livepeer/release-0.5.4

release v0.5.4

release v0.5.3

Bump to version 0.5.2

Bump to version 0.5.1

Bump to version 0.5.0

TESTING: try a temp named tag

Update version and infura endpoint. Had to change nil to 0 due to gol…

…ang version issues

upgrade version to 0.4.0

Merge pull request livepeer#702 from livepeer/ar/broadcaster-verify-o…

…rch-sig

Add Broadcaster Verification of Orchestrator Signature

bump version