[DOC] added source link
More prominent github link and attribution.
removed unused code
Fixing links so they work on project pages

See 'Project Page URL Structure' section of
http://jekyllrb.com/docs/github-pages/.

That documentation stems from this comment
https://github.com/mojombo/jekyll/issues/332#issuecomment-18952908 on
Jekyll issue #332.

Basically, we set baseurl in _config.yml to the project name, and use
{{ site.baseurl }} throughout the site (with or without a trailing /,
depending on if we're followed by {{ page.url }} or '/css', '/js', etc
(detailed description in docs linked above).  When running locally, use
`jekyll serve --watch --baseurl '' `