Allow for new or editing.

bikeshop_project/registration/templates/edit_member_form.html

@@ -192,6 +192,7 @@
     {% if not form.instance.membership %}
     <div class="mdl-cell mdl-cell--8-col">
         <h3>No membership found.</h3>
+    <a class="mdl-button mdl-js-button mdl-button--flat mdl-js-ripple-effect mdl-button--colored" href="{% url 'new_membership' member_id=member.id %}">Add membership</a>
     </div>
     {% endif %}
 {% endblock %}