updating
Merge branch 'master' of https://github.com/ewjohnst/PHYS202-S13

Conflicts:
	Week3/GraphicsEx2.ipynb
adding mathematica
Merge branch 'master' of https://github.com/ewjohnst/PHYS202-S13
Merge branch 'master' of https://github.com/ewjohnst/PHYS202-S13
trying to open notebook