[O] org-ref update

[John Kitchin]

Hi all,

The org-ref code is finally all in emacs-lisp! This should make it much
easier to install, and is another step closer to getting org-ref into
MELPA.

The code can be found at https://github.com/jkitchin/org-ref

There are some relatively new features in org-ref if you have not been
following the bleed edge:

- New colored org-ref links to differentiate them from other
  org-links. Citations are greenish, refs and labels are maroonish.

- Context messages about links. With your cursor on a cite, ref or label
  link you will get a context message, e.g. a formatted citation, some
  context about the label a ref refers to, or a count of the labels in
  the mini-buffer.

- There is now an org-ref menu in the Org menu.

- There is a new org-ref-help function that opens an org-file of org-ref
  documentation.

- Pretty thorough integration of helm throughout org-ref, and some
  integration of hydra.

- A few utility libraries: doi-utils, isbn, wos, pubmed, arxiv,
  jmax-bibtex, sci-id, x2bib. Not all these are new, but if you didn't
  know about them, check them out.

- Cask integration. This mostly provides access to testing and
dependencies right now. org-ref is also now tested continuously at
https://travis-ci.org/jkitchin/org-ref (although, there are no tests of
substance yet, it at least checks that you can load it ;).

Read more at:
http://kitchingroup.cheme.cmu.edu/blog/2015/03/16/Update-on-org-ref-it-is-now-all-emacs-lisp/


--
Professor John Kitchin
Department of Chemical Engineering
Carnegie Mellon University
@johnkitchin
http://kitchingroup.cheme.cmu.edu