Add field published_on and title to Issue

/refs #16

Add field published_on and title to Issue and display both fields.

kontor-api/src/templates/comic/issue_detail.html

@@ -20,6 +20,14 @@
             <th scope="row">Issue Number</th>
             <td colspan="2">{{issue.issue_number}}</td>
           </tr>
+          <tr>
+            <th scope="row">Full Title</th>
+            <td colspan="2">{{issue.title}}</td>
+          </tr>
+          <tr>
+            <th scope="row">Published</th>
+            <td colspan="2">{{issue.published_on}}</td>
+          </tr>
           <tr>
             <th scope="row">Auf Lager</th>
             <td colspan="2">
@@ -56,6 +64,10 @@
             <th scope="row">Data Modified</th>
             <td colspan="2">{{issue.last_modified_date}}</td>
           </tr>
+          <tr>
+            <th scope="row">Data Version</th>
+            <td colspan="2">{{issue.version}}</td>
+          </tr>
         </tbody>
     </table>
   </div>