Add wrapper files to MANIFEST.in.
Add wrapper files to MANIFEST.in.

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