Python3 fix for rottentomatoes_list
Python3 fix for rottentomatoes_list

Before this, using rottentomatoes_list would try to retrieve URLs like
http://api.rottentomatoes.com/api/public/v1.0/lists/b'dvds'/b'current_releases'.json?apikey=...
(with b'' binary string markings)

crawln45/Flexget,JorisDeRieck/Flexget,OmgOhnoes/Flexget,tobinjt/Flexget,OmgOhnoes/Flexget,jawilson/Flexget,tobinjt/Flexget,jawilson/Flexget,JorisDeRieck/Flexget,Danfocus/Flexget,poulpito/Flexget,Danfocus/Flexget,crawln45/Flexget,qvazzler/Flexget,jacobmetrick/Flexget,gazpachoking/Flexget,LynxyssCZ/Flexget,drwyrm/Flexget,JorisDeRieck/Flexget,tarzasai/Flexget,JorisDeRieck/Flexget,drwyrm/Flexget,drwyrm/Flexget,sean797/Flexget,jawilson/Flexget,malkavi/Flexget,malkavi/Flexget,tobinjt/Flexget,malkavi/Flexget,dsemi/Flexget,Danfocus/Flexget,LynxyssCZ/Flexget,crawln45/Flexget,malkavi/Flexget,sean797/Flexget,ianstalk/Flexget,Flexget/Flexget,oxc/Flexget,qvazzler/Flexget,oxc/Flexget,qk4l/Flexget,crawln45/Flexget,tarzasai/Flexget,jacobmetrick/Flexget,ianstalk/Flexget,Flexget/Flexget,dsemi/Flexget,oxc/Flexget,poulpito/Flexget,tarzasai/Flexget,tobinjt/Flexget,qk4l/Flexget,qk4l/Flexget,sean797/Flexget,jawilson/Flexget,jacobmetrick/Flexget,LynxyssCZ/Flexget,Flexget/Flexget,LynxyssCZ/Flexget,gazpachoking/Flexget,Flexget/Flexget,dsemi/Flexget,qvazzler/Flexget,OmgOhnoes/Flexget,poulpito/Flexget,Danfocus/Flexget,ianstalk/Flexget