[collectibles] Poster update

I’ve updated the poster page with a number of new posters from the 50s
through to now including the F-Type concept and 200 Model Year.

Main additions are another 12 original showroom posters from the 50s
celebrating Jaguar wins and achievements.

Tony (Sussex, UK) [1998 XKR Coupe]
Jag-lovers Brochures: www.jag-lovers.org/brochures/
Collectibles Homepage: www.jag-lovers.org/collectibles/
Jaguar/Daimler Collectibles Exchange
Jag Auction Watch - www.jagweb.com/wpoc/awatch.html
Local JEC Site: www.jagweb.com/west-sussex-jec/