[dev] update doctrine dbal 2.4.2 => 2.5.0-beta3
add unsubscribes rme
[dev] update scaffolding repo namespace
[dev] fix schema builder used annotation
fix annotation FQN not using proper reflection
add unsubscribe token field and handler
fix worker output
mailer accepts user, creates unsubscribe token
fix entity createdAt
add email layout and unsubscribe link
fix link students on unregistered existing users
add unsubscribe check to mailer
[dev] update query panel v1.0.0 => v1.0.1
refactor tokens to separate classes
refactor tokens out of presenter
fix registration detection of already registered