Symfony 4 compatibility

Full Changelog

• Allow unresolvable data roots for filesystem locator (robfrawley)
• Add "fixed-size" filter implementation (peter-gribanov)
• Only use actual path without any query parameters from the url (TiMESPLiNTER)
• Add missing ImageType::getBlockPrefix() method (EmmanuelVella)
• Replace app/console with bin/console (welcoMattic)
• Fix Symfony 4.2 Deprecation Warnings (hjanuschka)
• Fix special characters encoding in URL path (dbalabka)
• Update imagine/imagine dependency to 1.1 (maximgubar)
• Only use actual path without any query parameters from the url (maximgubar)
• [Dependency Injection] Add aliases for data and filter manager (fpaterno)
• Use Autorotate Filter from Imagine library (franmomu)
• Fix Mime deprecations for Symfony 4 (franmomu)