Riizade/config file (#520)

* added POJO + yaml file

* made config members public

* switched to yaml

* modified files to use YamlConfig over ServerConstants

* removed constants from ServerConstants

* removed unused imports

* removed unused import

* removed world ini

* removed now unused .ini files

* fixed docker-launch.sh

* added jackson dependency JARs

* fixed errors

* removed unused server config values, added world defaults

* don't use env variables for docker

* fixed package imports/specifiers for js files

This commit is contained in: