Added a template document

A template document with a few useful examples showing how to use
LaTeX.  Makes use a glossaries and biblatex as well.

Also updated .gitignore to ignore the LaTeX output files

Signed-off-by: JP-Ellis <coujellis@gmail.com>
Updated LaTeXmk configuration

LaTeXmk will now ignore non-existent .makefile and no longer produce an
error message.

Signed-off-by: JP-Ellis <coujellis@gmail.com>
Updated the README