another signature fix, support for issubclass() and callable()
another signature fix, support for issubclass() and callable()

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