* master:
  made monolog logger as the default logger when the monolog bridge is installed
  added the ServiceProviderInterface::boot() method
  fixed some skipped comments
  fixed Twig provider
  removed the Symfony bridges provider as it is not needed anymore with Composer
  added the possibility to register a logger for internal services
  fixed markup in the docs
  removed translation.messages in favor of translation.domains
  Remove dependency on the ClassLoader component.