A man known by the nickname "Roadrunner" has spent nearly two decades traveling across United States. Along the way, he has made it a mission to leave every community a little cleaner than he found it.Paul, 63, arrived in Sheboygan about two months ago. Originally from Ohio, he has been traveling from city to city since 2008, carrying his belongings with him and embracing a minimalist lifestyle. "I'm a traveler. I'm a minimalist. I'm 63 years ol…