OPDS Marvin (and Marvin 3) now really work (#79)

OPDS should now also work with reverse proxy configuration
Changed readme (reverse proxy configuration)
No progress for calibre companion

cps/templates/discover.html

@@ -30,7 +30,6 @@
         {% endif %}
       </div>
     </div>
-      <!-- <p><a href="{{ url_for('edit_book', book_id=entry.id) }}">{{entry.authors[0].name}}: {{entry.title}}</a></p> -->
     {% endfor %}
   </div>
 </div>