Mention cpdef enum in docs.
Mention cpdef enum in docs.

da-woods/cython,hhsprings/cython,fabianrost84/cython,mcanthony/cython,ChristopherHogan/cython,cython/cython,c-blake/cython,mrGeen/cython,mcanthony/cython,mrGeen/cython,c-blake/cython,acrispin/cython,c-blake/cython,acrispin/cython,mrGeen/cython,da-woods/cython,mrGeen/cython,hhsprings/cython,da-woods/cython,fabianrost84/cython,fabianrost84/cython,hickford/cython,scoder/cython,fperez/cython,da-woods/cython,ChristopherHogan/cython,cython/cython,fperez/cython,ChristopherHogan/cython,hickford/cython,acrispin/cython,acrispin/cython,fperez/cython,c-blake/cython,acrispin/cython,mcanthony/cython,c-blake/cython,fabianrost84/cython,cython/cython,hhsprings/cython,hhsprings/cython,fperez/cython,fperez/cython,fabianrost84/cython,hickford/cython,hickford/cython,mcanthony/cython,scoder/cython,hhsprings/cython,hickford/cython,cython/cython,mcanthony/cython,mrGeen/cython,scoder/cython,scoder/cython