disable Py2.5 builds in travis - their installation appears to be broken
disable Py2.5 builds in travis - their installation appears to be broken

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