Update the Specification, LibCyphal status, and the copyrights (#39)

Author: pavel-kirienko

app/templates/base/footer.html

@@ -6,7 +6,9 @@
     </strong>
   </p>
   <p>
-    Copyright &copy; 2015&ndash;{{ config.CURRENT_YEAR }} UAVCAN Consortium
+    Copyright &copy; 2022&ndash;{{ config.CURRENT_YEAR }} OpenCyphal development team
+    <br>
+    Copyright &copy; 2015&ndash;2022 UAVCAN development team
   </p>
   <p>
     This work is licensed under a

app/templates/home/content-column.html

@@ -131,7 +131,7 @@ <h1 id="how">How do I use Cyphal?</h1>
         <td>Cyphal/UDP, Cyphal/CAN</td>
         <td>C++</td>
         <td>Embedded (higher-level), application</td>
-        <td>Work in progress</td>
+        <td>Beta</td>
       </tr>
       <tr>
         <td><a href="https://github.com/OpenCyphal/pycyphal">PyCyphal</a></td>

requirements.txt

@@ -1,3 +1,4 @@
 Flask~=1.0
+MarkupSafe~=1.0
 cachelib ~= 0.1
 sentry-sdk[flask]~=0.6.9