Extend authority round consensus test (openethereum#4756)

* add auth round test case

* correct fork assertion

js-precompiled 20170223-141159

Create Dockerfile

add 1stable` for docker hub

Merge branch 'beta' of github.com:ethcore/parity into beta

[ci skip] typo fix in gitlab-ci

Removed pdbs

Removed pdbs

downgrade rust (windows build)

Dont push-release for beta/stable changes

Fixing etherscan price parsing (openethereum#4202) (openethereum#4209)

* Fixing etherscan price parsing

* Handling all errors