Simplify docker publish plugin
Merge pull request #591 from scrapinghub/docker-host

Use well known DOCKER_HOST syntax for Docker publish
Docker publish: added tags field to allow for a single build to be tagged with multiple
tags. Only push tags that are applied to the repo. Change custom_tag to just tag.
Merge pull request #593 from epipho/custom-tags

Allow docker publish to add multiple tags
get commit author email address from raw_author instead of author field for bitbucket
Merge pull request #604 from bradrydzewski/master

added token to post-commit hooks
move regexp to package level variable, add check for email array
Merge pull request #605 from bradrydzewski/master

slightly altered the URL token format
Merge pull request #603 from gregory90/fix-commit-author-bitbucket

Fix commit author email for bitbucket
only generate repo token or key if not exists