Moved phantomjs instructions
Moved phantomjs instructions

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