Need to review and document configuration options

[nfreear]

Applies to:

• https://github.com/mhawksey/wp-evidence-hub
• https://github.com/IET-OU/oer-evidence-hub-org

For example, Bug #36:

<?php
class Evidence_Template ... {
...
    $do_rewrite = ! $this->get_option( 'evidence_post_type_no_rewrite' );