updated bs4 module version in HW0
modified prob 3(a) to include E(Y)=0
modified 3(b), 3(c) to include year 2012
clarified Prob 1(b) in HW1
fixed switch typo in HW0_solutions.ipynb
changed prob 1(b) and 1(c)
fixed typo
added Lab2_Notes.ipynb
added link to download Lab2_Notes.ipynb
updated to ipython 2.2.0; re-posting HW1.ipynb
fixed typo
corrected download link to raw.github.com
try 2 to fix github download link
added cell for solutions in 1(c)
Merge pull request #1 from cs109/master

Homework 1 update