add new signers

activities/radiodirective/sigtable.en.xml

@@ -49,6 +49,10 @@
       <td><img src="img-signers/do-foss.png" alt="Do-FOSS" /></td>
       <td>Do-FOSS</td>
     </tr>
+    <tr>
+      <td><img src="img-signers/effi.png" alt="Electronic Frontier Finland" /></td>
+      <td>Electronic Frontier Finland</td>
+    </tr>
     <tr>
       <td><img src="img-signers/elphel.png" alt="Elphel" /></td>
       <td>Elphel</td>
@@ -197,6 +201,10 @@
       <td><img src="img-signers/sysmocom.png" alt="sysmocom - systems for mobile communications GmbH" /></td>
       <td>sysmocom GmbH</td>
     </tr>
+    <tr>
+      <td><img src="img-signers/tanaza.png" alt="Tanaza" /></td>
+      <td>Tanaza</td>
+    </tr>
     <tr>
       <td><img src="img-signers/thinkpenguin.jpg" alt="ThinkPenguin" /></td>
       <td>ThinkPenguin</td>