Fix Issue #8 - Empty pages in generated PDF

Fixes blank pages issue in PDF generated by the readthedocuments site.

The change to conf.py fixes blank pages.

The change to z_appendix.rst reverses a prior commit of mine where I was trying to make this table consistent i.e. where the second column of the table had multiple git commands, they should appear on separate lines. This caused the readthedocuments PDF generation process to add a blank page that even the fix to conf.py wouldn't get rid of.