Merge remote branch 'upstream/develop' into develop
Merge remote branch 'upstream/develop' into develop
Merge remote branch 'upstream/develop' into develop
Implemented support for permalinks.

* Added permalink tests to test driver.

* Permalink styles into header.

* Included permalinks in the basic example.

* Made changes to support more modern appearance while still appearing
  in the DOM to support accessibility.

* Updated documentation.

* Improved generated content to make it more RDFa and ARIA compatible.
Fixed RDF issue (closes #302)
Made changes to resolve comments by Robin:

Log messages outside of check to see if the feature is enabled.
Suppress RDFa if RDFa is not enabled.
Improved some logic.
Made the configuration test even simpler.
Merge pull request #301 from halindrome/develop

Adding support for "permalinks"