By Alexandria Sage PARIS (Reuters) – The faded beauty of a crumbling theater, whose curtain opened to reveal an ultra-modern skyline, was the backdrop to Chanel's haute couture show on Tuesday which designer Karl Lagerfeld described as a mix of "tradition with the future." Models walking across the stage and into the audience seated in old wooden theatre chairs showed off a glittery collection that played with proportions. Marked by doubled short skirts and wide low-slung belts, Lagerfeld also added long columned dresses in grays, silvers and blacks and a high dose of gunmetal blue. …