Add support for Private Servers and for Memory Segments

[ross-p]

Add Private Server Support

Copied private server work from @Parakoopa and modified it to be backward-compatible. All existing ansible command-lines will continue to work as they previously did.

New optional ansible-playbook environment vars:

• -e screeps_basic_auth=1
• -e screeps_hostname=http://your.private.server.name:21025

Add Memory Segment Support

By default stats are still read from Memory.stats, however you can now optionally load stats from a memory segment instead.

New optional ansible-playbook environment vars:

• -e screeps_stats_source=segment=0 will load the stats key from memory segment 0. Change to whatever segment number you wish to use.

Add Documentation

Added documentation (thanks @ags131) to help other people work with this code base in the future.

Developer Note

If you merge this, you'll also need to publish a new Docker Hub image of screepers/screeps-statsd. Don't forget to do that. ;)

[AlinaNova21]

Pinging @ButAds :)
I can build and push it to screepers on dockerhub once merged :)

[ross-p]

@ButAds I had to add back the node:image element of the docker-compose.yml.j2 since ansible was unable to start the docker containers without that. Otherwise your recent changes are merged.

[TimMeissner]

docker-compose.yml file is missing in your repo btw