Add Ruby Bibliography.

I've imported all the references from the original JRuby In Research page, removed references only relevant to JRuby and applied a consistent ordering. I've also added a link to the ISO draft.

I only changed `bibliography.markdown` and `index.markdown` (listed right at the bottom of the PR), but maybe because I have a new version of Jekyll and it's a new year lots has changed. Is this right, or are files being rebuilt when they shouldn't be?