text: Title: Generate root URL for a channel if it is homepage
  Body: Currently the url generated to "home" channel is /home (in top menu of purecss theme)
  
  If a channel is marked to be homepage, there is no need to add /home in the channel url, it should render as the root of the site. (take care of installations in subfolders)
  
  For contents it should keep using /home/ because it is part of long slug, also should work for another types .rss .xml .pdf .atom and .json
  