Fixes #584
docker_version can now be left blank to automatically download and
install the latest available. Docker client will not be installed if it
is already present in the build container.
Merge pull request #629 from epipho/local-docker-client

Allow docker publish to use an installed docker cli
Merge pull request #600 from netantho/netantho-584

Fixes #584
Return ErrInternalServer when docker server return 500 code
added docs to README
Merge pull request #681 from bradrydzewski/master

added docs to README
Merge pull request #678 from Bugagazavr/docker-client

Return ErrInternalServer when docker server return 500 code
Add plain text fallback messages for slack plugin
prevent panic when replaying on closed channel
Merge pull request #686 from bradrydzewski/master

prevent panic when replaying on closed channel
Merge pull request #685 from carnivalmobile/slack_fallback_message

Add plain text fallback messages for slack plugin
Wall feed
Add feed route
Merge pull request #693 from scottferg/master

Add activity feed endpoint
reverse sorting private params when injecting
Merge pull request #694 from bradrydzewski/master

reverse sorting private params when injecting, #692
updated to use new documentation link
Merge pull request #701 from bradrydzewski/master

updated to use new documentation link
Testing: Make MySQL DB creating more error resilient