Updated Library logic so I can play a song in the library.

Still need to be able to get the song file from the element and
update the playlist builder so its player respects cuein/cueout and fadein/fadeout

airtime_mvc/public/js/airtime/library/library.js

@@ -620,4 +620,4 @@ function addQtipToSCIcons(){
             });
         }
     });
-}
+}