Merge pull request #4 from tabo/master

Added print_function import for python 2.x
Docker isolation play parameter
Explanation of list_rules and list_maps
Space after encoding definitions
Basic isolator utility, able to build a container with the zombsole folder and prototypes of other functionality.
Usage of the isolator from play, will work when isolator is finished
Added isolator requirements, and installed on the image
Requirements before full zombsole folder, for better caching
Able to specify a port for the isolator on play
New dependency for isolator
Scaffold for start_isolator, and added the port parameter to player_creator
Isolation logic in isolation folder, with separated modules
Reflect change of paths to isolator requirements in dockerfile
Isolator starter inside players server, and updated play
Missing init on isolation
Dockerfile back to root, because docker doesn't allow ADD ../
Typo
Players_server is executable, and docker runs that
Building and running the isolator container will be done directly with docker
Game has the logic of obtaining creators, and handling isolation. Rules for players is string.