updated Docker Client to accept TLS
Fixes #584
removed hard-coded `http` in Docker client
cleanup docker.New to overload, so to speak
minor docker client refactoring
pass docker cert and key as byte arrays or file paths
drone client accepts docker host, cert and key
Fix incorrect drone branch for pull requests

Fixes #607
Adjust Slack message format to match HipChat's

Also add some tests for formatting. See #586.
updated README
Merge pull request #599 from bradrydzewski/remote-workers

Updated Docker Client to accept TLS
Merge pull request #608 from shopa/fix-wrong-drone-branch

Fix incorrect drone branch for pull requests
Add docker section in .drone.yml with net option
Merge pull request #617 from floatdrop/docker-section-in-yaml

Add docker section in .drone.yml with net option
Wrap ssh cmd in quotes to prevent execution of &&-chained commands on local machine
fixe #620
Merge pull request #622 from bradrydzewski/master

fixes #620
fixed missing live console output bug on rebuild
Fix failing unittest
Merge pull request #623 from daMupfel/master

Fixes #448 missing live console output bug on rebuild