[OPEN-ILS-DOCUMENTATION] Pull request: docs on OPAC templates and authorities

[Jane Sandberg]

Hi all,

I just added a pull request with some additions to the docs (including 
some 2.8 documentation that I finally got around to writing...)

It is here -- 
https://github.com/evergreen-library-system/Evergreen/pull/39 -- please 
let me know if there's a better GitHub-based workflow for submitting these.

Thanks!

   -Jane