Construction on the Milwaukee Bucks arena is 68 percent complete and the structure will be completely enclosed by the end of November, as planned by the Bucks and their contractors. See the arena — inside and out — by checking out the attached slideshow. “For all intents and purposes, we are enclosed,” Bucks president Peter Feigin said Friday during a media tour. The main section of the arena where construction crews are scurrying to complete their exterior work is the north facade, said…