refactor __class__ replacement hack, argument coercion and self-arg checking in AttributeNode
refactor __class__ replacement hack, argument coercion and self-arg checking in AttributeNode

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