added Nette\Security\Passwords
Passwords: added needsRehash()
SimpleAuthenticator: added support for roles
added Nette\Bridges; DI\NetteExtension, Tracy panels and Latte macros moved to Bridges (BC break!)
framework uses Tracy instead of Nette\Diagnostics (BC break)
Identity: removed annotation @serializationVersion
tests: removed usage of Container
added testing support files
added composer.json