fix: update export views to match model changes

Resolves #72

export/templates/export/export.html

@@ -30,6 +30,15 @@
                 </td>
             </tr>
 
+            <tr>
+                <td>Person Answer Sets</td>
+                <td></td>
+                <td>
+                    <a class="btn btn-info"
+                       href="{% url 'export:person-answer-set' %}">Export</a>
+                </td>
+            </tr>
+
             <tr>
                 <td>Relationships</td>
                 <td></td>