0.12.0

Changelog

• Added getAppRootDir() to AbstractConfig.
• Added APP_ENV environment key, to define different config files on different environments.
• Added 'config-readers' key in the globalServices and gacela.php.
• Deprecated getApplicationRootDir() from Config. Use getAppRootDir() instead.
• Deprecated 'custom-services-location' key in the globalServices and gacela.php.
• Removed EnvConfigReader from gacela-project/gacela.
  • If you want to read .env values, you should require gacela-project/gacela-env-config-reader.