move exception class into shadow function as we may not want to export it under the cython.* namespace at this point
move exception class into shadow function as we may not want to export it under the cython.* namespace at this point

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