XJR11 updates

Re-releasing the Jaguar kits has offered an opportunity to update the models and expanded the possible build variations. They've required some new parts, and a chunk of work re-mapping those parts across the sheets.

The Silk Cut kits now have the later 1990-season wide-nose option. Graphic variations include both the #3 & #4 cars in addition to the unbranded "Eu Purple" blocks. There are also side panels for the Don Law's non-skirted Historics configuration.

The 1990 IMSA-spec XJR-10 now has proper snorkel exhausts emerging up through the deck between the rear wheels.