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)
fixed links to download Lab2_Notes.ipynb from github
added Lab3_Notes.ipynb
added task to clone cs109 2014 repos in lab3
added HW1-solutions.ipynb
added HW2.ipynb
added submission instructions to HW2.ipynb
fixed centering of example codein HW2.ipynb
fixed typo: misspelled senate
fixed typo about projection to 1st PC in Prob 1
added shorthand for PC1