Extended about section of help

(cherry picked from commit 06c6851)

src/app/help/help.component.scss

@@ -9,3 +9,8 @@ p {
 .video {
     width: 100%;
 }
+
+.ext {
+    height: 40px;
+    padding-right: 5px;
+}

src/app/help/help.html

@@ -26,12 +26,14 @@
     </mat-card-header>
     <mat-card-content>
         <p>
-            <span class="vat">Vat</span> is developed by the Database Research Group of the University of Marburg.
-            Head of the group is Prof. Dr. Bernhard Seeger.
+            <span class="vat">Vat</span> is developed by the Database Research Group of the University of Marburg (head: Prof. Bernhard
+            Seeger) in cooperation with the Senckenberg Biodiversity and Climate Research Centre (BiK-F) (head: Prof. Thomas Hickler).
             You can contact us at <a href="mailto:vat@mathematik.uni-marburg.de" target="_blank">vat@mathematik.uni-marburg.de</a>
-            or visit <a href="http://dbs.mathematik.uni-marburg.de" target="_blank">dbs.mathematik.uni-marburg.de</a> for further
-            information.
+            or visit our <a href="https://github.com/umr-dbs/VAT " target="_blank">GitHub</a> for further information.
         </p>
+        <a href="https://www.uni-marburg.de" target="_blank"><img src="assets/images/logo_umr.png" class="ext"></a>
+        <a href="https://dbs.mathematik.uni-marburg.de" target="_blank"> <img src="assets/images/logo_agdbs.png" class="ext"></a>
+        <a href="http://www.bik-f.de" target="_blank"><img src="assets/images/logo_bikf.png" class="ext"></a>
     </mat-card-content>
 </mat-card>