When George Paton watched his Minnesota Vikings complete their season Jan. 3, only one player on the roster — center Brett Jones — was acquired via trade. But don’t think Paton, in his new role as the Broncos’ general manager, will stand idle in rebuilding a team in the midst of a five-year playoff drought. Paton made draft-and-develop his modus operandi (“The best way to build a football team”) during Tuesday’s introductory media session, but 24 years in pro football have taught him to be open-minded about any kind of move. “Will (we) be aggressive and dip into free agency or the trade market?