Add unicorn
Updated eventmachine, rack and thin
Added Dockerfile and runner script that writes config to file.

ASQ needs a configuration file. To be able to run ASQ in a Docker
container in a 12factory way, I've created a wrapper script that
writes a configuration file based on environmental variables.
Merge branch 'master' into dockerize

Conflicts:
	Gemfile.lock
Always enable all available backends.
Merge pull request #39 from Springest/dockerize

Dockerize