prepare release of 0.19 beta 1
prepare release of 0.19 beta 1

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