Renamed some constants. I18N loads default language in initialization
Fixing Eclipse+Maven integration issues after upgrading the java-formater and license-checker plugins
Fixing formatting issues
Renaming:
 - GameController to GameLoop
 - EngineGameController to EngineGameLoop
 - gameController properties to gameLoop properties
Merge pull request #52 from imartinezortiz/engine_refactoring

Various renamings
Can parse, evaluate and serialize strongly-typed expressions

Implements most common operations