Fixed the subsets self test
Merge pull request #245 from xtitter/gh-pages

show videos, readings o berkeley course
Merge pull request #243 from paulirwin12/gh-pages

Fixed the subsets self test
Tweaked comments a bit more for subsets self test.
Merge pull request #246 from peterasujan/gh-pages

Tweaked comments a bit more for subsets self test.