Adding sphinx dev testing to the travis matrix
Adding sphinx dev testing to the travis matrix

dpshelio/astropy-helpers,dpshelio/astropy-helpers,astropy/astropy-helpers,Cadair/astropy-helpers,astropy/astropy-helpers,bsipocz/astropy-helpers,bsipocz/astropy-helpers,bsipocz/astropy-helpers,Cadair/astropy-helpers