Get OBA working in Docker

[aaronbrethorst]

Fixes https://github.com/OneBusAway/onebusaway-application-modules/issues/348

• Add Dockerfiles for building JAR and WAR files, transit data bundles, and an app server
• Add scripts and config files to make everything work properly
• Add a docker-compose.yml file to orchestrate everything
• Update the README to explain how to use all of the new features