The Billboard website has charts for various genres.  For example, this category for Rock

http://www.billboard.com/charts#id-chart-category-rock

Each chart offers the ability to play the songs in the list with Spotify web player.  I would like to turn that list of songs into a Spotify Playlist that I can sync to my mobile device for offline playback.  What's the easiest way to do that?  If found many hard ways, but not a nice clean easy way.

I currently start the playback of the list of songs in Spotify.  I then select each song in the list individually, and add each to a new playlist.  This requires hundreds of mouse clicks to add a 50 song Billboard chart to a Spotify Playlist.  Then once the Playlist is created in the web player, it can be found in my mobile device.