Properly ignore files when copying
Properly ignore files when copying

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