merge 0.19.x branch into master
merge 0.19.x branch into master

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