release: 0.4.0: Domain-admin groundwork, send-log auth, packaging fixes

The project's mark is now in use rather than only on file. The README opens
Added:
  - The project's mark is now in use rather than only on file. The README opens
Changed:
  - panel: the sign-in and setup pages are now a column the width of their own
  - panel: the three monitoring pages — Deliveries, Mail queue, System log — are
Fixed:
  - panel: Deliveries now shows the subject as text rather than as its MIME
  - panel: table cells may now break inside a word, so no single long value can
  - panel: the Applications list on a domain page no longer comes apart. It was a

Full detail: CHANGELOG.md (0.4.0).

internal/web/templates/deliveries_rows.html

@@ -9,12 +9,12 @@
     <tbody>
       {{range .Rows}}
       <tr>
-        <td class="muted">{{.CreatedAt.Format "2006-01-02 15:04:05"}}</td>
+        <td class="time muted">{{.CreatedAt.Format "2006-01-02 15:04:05"}}</td>
         <td>{{.Domain}}</td>
         <td>{{.AppLogin}}</td>
         <td>{{.From}}</td>
         <td>{{.To}}</td>
-        <td>{{.Subject}}</td>
+        <td class="subject"><span title="{{.Subject}}">{{.Subject}}</span></td>
         <td>{{.Status}}</td>
       </tr>
       {{end}}