Update glossary to make it link-able

Update glossary to make it link-able

Using the sphinx glossary directive [1], the terms in the glossary can
now be linked from the main docs.
To link a glossary term, use the following syntax to link to term Anuket::

    :term:`Anuket`

    :term: `This project <Anuket>`

[1] https://sublime-and-sphinx-guide.readthedocs.io/en/latest/glossary.html

Signed-off-by: Emma Foley <efoley@redhat.com>