Released version 2.3.0

• in config file you can move all sections placed in nette to one level up. If you move up one of the sections container, mailer or debugger, rename it to di, mail and tracy.
• added Configurator::addServices()
• uses new DI\ContainerLoader
• removed deprecated constants Configurator::DEVELOPMENT & PRODUCTION (BC break)
• Configurator::setDebugMode() accepts only bool / string / array