Move Open Graph comment inside conditional, fix indentation.

These are primarily cosmetic, resulting in less confusing HTML being generated for those who care to look.
Simplify the optional inverse navbar conditional.

Less repetition is always better than more. Also, change <nav/> to <div/> as that is standard HTML and is what the Bootstrap examples all use.

These changes are cleanups. They should have no visual or functional effect.
Set Disqus language
Cleaning up meandering indentation.
A macro generating a Creative Commons licence mark.

This is part of addressing #41.
Generate a Creative Commons license mark. Fixes #41.

Declares new configuration variables: CC_LICENSE, CC_LICENSE_DERIVATIVES,
CC_LICENSE_COMMERCIAL, and CC_ATTR_MARKUP. Documentation in README.
Add documentation for generating CC license marks.

This wraps up addressing issue #41.
Update footer documentation to mention license mark.
Fix back-quoting and double-quoting mistakes.
Make licensor overrideable by article author.
Straighten out indentation so we get less confused.
Replace line break with <p> for better text margin.
Adds SITEBRAND documentation to README.md
Adds breadcrumbs documentation to README.md
Adds navbar-inverse documentation to README.md
Adds related-posts documentation to README.md
Merge pull request #40 from tao-guo/disqus

Set Disqus language
Merge pull request #42 from hlapp/cleanup-fixes

Cleanup fixes
Merge branch 'cc-license-mark' of https://github.com/hlapp/pelican-bootstrap3 into hlapp-cc-license-mark

* 'cc-license-mark' of https://github.com/hlapp/pelican-bootstrap3:
  Replace line break with <p> for better text margin.
  Straighten out indentation so we get less confused.
  Make licensor overrideable by article author.
  Fix back-quoting and double-quoting mistakes.
  Update footer documentation to mention license mark.
  Add documentation for generating CC license marks.
  Generate a Creative Commons license mark. Fixes #41.
  A macro generating a Creative Commons licence mark.
Merge branch 'fix-readme' of https://github.com/magnunleno/pelican-bootstrap3 into magnunleno-fix-readme

* 'fix-readme' of https://github.com/magnunleno/pelican-bootstrap3:
  Adds related-posts documentation to README.md
  Adds navbar-inverse documentation to README.md
  Adds breadcrumbs documentation to README.md
  Adds SITEBRAND documentation to README.md