Merge branch '1.6' into 'DockerBuild'

.eslintignore

.gitignore

.travis.yml

app/modules/prover/lib/PowWorker.ts

app/modules/prover/lib/blockGenerator.ts

app/modules/prover/lib/blockProver.ts

app/modules/prover/lib/constants.ts

app/modules/prover/lib/engine.ts

app/modules/prover/lib/permanentProver.ts

app/modules/prover/lib/powCluster.ts

app/modules/prover/lib/proof.ts

app/modules/router.ts

app/modules/ws2p/lib/WS2PCluster.ts

app/modules/ws2p/lib/WS2PServer.ts

appveyor.yml

index.ts

test/fast/prover/pow-1-cluster.ts

test/fast/prover/pow-2-engine.js

test/integration/branches.js

test/integration/branches2.js