Added hints, tips, cautionary tales, blogs and humour links
Adding link to testimonials to navigation menu
Merge branch 'master' of github.com:swcarpentry/website
about/biblio.html: Fix ' </a>' -> '</a>' typo
Merge branch 'bibliography' (fixes #539)

* bibliography:
  about/biblio.html: Fix ' </a>' -> '</a>' typo
  Added hints, tips, cautionary tales, blogs and humour links
Adding Ben Morris to the roster
Merge pull request #547 from gvwilson/adding-ben-morris

Adding Ben Morris to the roster
Removing Greg's personal blog, adding the SSI blog
Badging Stefano Cozzini as an instructor
Adding Fernanda Foertter
Fixing bad closing tag
Merge pull request #549 from gvwilson/adding-fernanda-foertter

Adding fernanda foertter
Merge pull request #550 from gvwilson/instructor-badge-cozzini

Badging Stefano Cozzini as an instructor