Removed caps from category names.
Added author and articleBody
Added webpage type
Added headline schema
Added itemprop='about' to the first paragraph of guides.
Added guide-only limit, to the about-schema.
Added question/answer, and mainContent
Added improvable flag to show/hide the "Improve on Github" button.
Improved the error message for missing series indexes.
Tweaked the header 1-6 css to be visually different.
Added Getting Started with Ruby guide
Merge branch 'master' into code-schema
Merge branch 'guide-ruby'
Merge branch 'bug-categorynames'
Merge branch 'bug-serieserr'
Merge branch 'code-improvable'
Merge branch 'code-headers'