Ignore notebookapp.py, since it doesn't get covered
Ignore notebookapp.py, since it doesn't get covered

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