Fix demo setup.py.
Fix demo setup.py.

achernet/cython,madjar/cython,mrGeen/cython,encukou/cython,JelleZijlstra/cython,dahebolangkuan/cython,fabianrost84/cython,madjar/cython,roxyboy/cython,slonik-az/cython,fperez/cython,cython/cython,ChristopherHogan/cython,hhsprings/cython,hpfem/cython,dahebolangkuan/cython,andreasvc/cython,slonik-az/cython,acrispin/cython,hickford/cython,cython/cython,roxyboy/cython,rguillebert/CythonCTypesBackend,ABcDexter/cython,acrispin/cython,hpfem/cython,larsmans/cython,bzzzz/cython,hpfem/cython,madjar/cython,fperez/cython,encukou/cython,larsmans/cython,hpfem/cython,mrGeen/cython,slonik-az/cython,encukou/cython,mcanthony/cython,scoder/cython,c-blake/cython,rguillebert/CythonCTypesBackend,larsmans/cython,hickford/cython,da-woods/cython,da-woods/cython,c-blake/cython,larsmans/cython,cython/cython,fabianrost84/cython,ABcDexter/cython,mrGeen/cython,fabianrost84/cython,fabianrost84/cython,mcanthony/cython,marscher/cython,hickford/cython,JelleZijlstra/cython,roxyboy/cython,fperez/cython,ChristopherHogan/cython,cython/cython,achernet/cython,fabianrost84/cython,acrispin/cython,ChristopherHogan/cython,dahebolangkuan/cython,hickford/cython,achernet/cython,dahebolangkuan/cython,da-woods/cython,encukou/cython,andreasvc/cython,roxyboy/cython,c-blake/cython,scoder/cython,JelleZijlstra/cython,ABcDexter/cython,hhsprings/cython,fperez/cython,acrispin/cython,mcanthony/cython,mrGeen/cython,achernet/cython,achernet/cython,JelleZijlstra/cython,fperez/cython,andreasvc/cython,marscher/cython,bzzzz/cython,c-blake/cython,madjar/cython,mcanthony/cython,acrispin/cython,dahebolangkuan/cython,hhsprings/cython,andreasvc/cython,bzzzz/cython,larsmans/cython,hhsprings/cython,c-blake/cython,hickford/cython,andreasvc/cython,scoder/cython,marscher/cython,da-woods/cython,rguillebert/CythonCTypesBackend,madjar/cython,marscher/cython,ABcDexter/cython,scoder/cython,ABcDexter/cython,slonik-az/cython,slonik-az/cython,bzzzz/cython,JelleZijlstra/cython,mcanthony/cython,mrGeen/cython,marscher/cython,rguillebert/CythonCTypesBackend,roxyboy/cython,hhsprings/cython,encukou/cython,hpfem/cython