session4
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
include pyplot
Merge remote-tracking branch 'upstream/master'
merge
moved to session dir

Moved the clusters.ipynb and associated files to the proper directory
(Session12_140530)
pca notebook for session 13
Merge pull request #18 from abonaca/session13

Session13
updated .gitignore

ignored the ._ files
Added session 14 ipython notebook
Merge pull request #19 from kayleanelson/master

Added session 14 ipython notebook
Merge remote-tracking branch 'upstream/master'