readme.md: added badge and link to Packagist
opened 2.2
NetteExtension: services nette.latte & nette.template do not trigger E_USER_DEPRECATED
added NetteAccessor & deprecated Configurator constants for back compatibility with 2.1
Configurator: fixed missing createLoader()
Revert "DI\Container: magic accessors are disabled by default"

This reverts commit a7a0b355d34fa83fb2229346c5f0338f6d6f5606.