Update status for Vanguard

The New York Times article says Vanguard has committed to adding 2FA by the end of 2014.
Add Hulu
Add Last.fm
Add Grooveshark
Merge pull request #674 from dsoegijono/patch

Add Hulu, Last.fm, and Grooveshark to Entertainment
Update Gemfile to new GitHub Pages and Jekyll gem
Remove `safe` in _config, GH Pages defaults to it
Update link for Vanguard
Update Travis Ruby version
Explicitly mention install command
Remove Gemfile.lock
Merge pull request #681 from jdavis/fix-travis

Fix failing of Travis
Merge pull request #672 from russelldavis/patch-1

Update status for Vanguard
Update education.yml
Merge pull request #683 from dsoegijono/patch

Add Academic Earth, Edmodo, edX to Education