TODO
- separate error handling from processing
- tab completion

environment
-----------

  ```shell
  docker network create scrow 2>/dev/null || true
  docker run -d --network scrow -it --rm --name mongo -p 27017:27017 mongo
  docker run -d --network scrow -e ME_CONFIG_MONGODB_SERVER=mongo -e ME_CONFIG_MONGODB_AUTH_PASSWORD='' -e ME_CONFIG_MONGODB_AUTH_USERNAME='' --name mongo-express -p 8081:8081 mongo-express
  ```

modules
-------

* APIs
  ----

* core-api contains api for all java development
* core-bukkit-api contains api for bukkit development
  * depends on core-api

* implementations
  ---------------
  the `-impl` suffix indicates that this module implements the API with the same prefix.
  So `core-impl` implements `core-api`.
  * core-bukkit-impl is a spigot plugin. It shades core-impl.