Add local copy of clustering function
Revise/clean up Jeff's slides
Merge remote-tracking branch 'origin/master' into eda

* origin/master:
Remove numeric prefix for now
Update Jeff's slides
Edit Jeff's slides
Remove slide on fast.svd
Finish cleaning up Jeff's slides
Clean up kmeans lecture
Edit title slide
Finish tweaking hclust lecture
Take out expository graphs for now
Rename directories
Typo
Add PDF slides and individual slides
Typos
Merge pull request #38 from rdpeng/eda

Eda