merge 0.20.x branch into master
merge 0.20.x branch into master

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