include recent Python versions in travis build
include recent Python versions in travis build

fabianrost84/cython,cython/cython,da-woods/cython,cython/cython,fabianrost84/cython,ChristopherHogan/cython,ChristopherHogan/cython,da-woods/cython,scoder/cython,scoder/cython,scoder/cython,fabianrost84/cython,fabianrost84/cython,scoder/cython,ChristopherHogan/cython,fabianrost84/cython,da-woods/cython,cython/cython,da-woods/cython,cython/cython