Changed: Refactor to Invoice to Save Invoice to make Invoice more like offer.
Added: Return Value to offer from project.
Changed: Route to project from offer.
Fixed: Removed Project Refernece form Offer Fixture.
Fixed: Multiple FIxes to Offerhandler including handling of already existing Projects and Bidirectional Mapping Handling.
Fixed: Added Missing Getter and Setter
Fixed: PHPDOC.
Fixed: Missing FormOptions.