Don't fix ipython version any more
Don't fix ipython version any more

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