First commit of a docker worker
Remove vagrant file for CoreOS
Remove Dockerfile from top level
Add builder for common docker image
Improve makefiles general structure
Cleanup common dockerfile
Launch python container as a worker
Improve structure of python worker
Install ipython in python container
Fix warning with logging module
Add option to fall back to ipython in container
Build of python container depends on py files
Add option to specify port in worker
Import user's main and run it as callback
Add 'user_code' directory to path
Initial implementation of registering a module
Fix wrong path to uncompress tarfile
Fix also zip file path
Add enough tools to build Python extensions
ENV is not needed since it is inherited