Add sphinx task
Add sphinx task

jhamrick/nbgrader,jupyter/nbgrader,EdwardJKim/nbgrader,ellisonbg/nbgrader,ellisonbg/nbgrader,ellisonbg/nbgrader,jupyter/nbgrader,dementrock/nbgrader,jhamrick/nbgrader,ellisonbg/nbgrader,MatKallada/nbgrader,alope107/nbgrader,EdwardJKim/nbgrader,dementrock/nbgrader,EdwardJKim/nbgrader,modulexcite/nbgrader,jhamrick/nbgrader,modulexcite/nbgrader,jhamrick/nbgrader,MatKallada/nbgrader,jupyter/nbgrader,jupyter/nbgrader,alope107/nbgrader,jupyter/nbgrader,EdwardJKim/nbgrader