Docs: Add missing file

doc/yarp-doxygen-footer.html

@@ -0,0 +1,23 @@
+<!-- HTML footer for doxygen 1.8.13-->
+<!-- start footer part -->
+<!--BEGIN GENERATE_TREEVIEW-->
+<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
+  <ul>
+    <!--BEGIN PROJECT_NAME--><li><span id="projectname_footer">$projectname</span></li><!--END PROJECT_NAME-->
+    <!--BEGIN PROJECT_NUMBER--><li><span id="projectnumber" class="version_switch">$projectnumber</span></li><!--END PROJECT_NUMBER-->
+    $navpath
+    <li class="footer">$generatedby
+    <a href="http://www.doxygen.org/index.html">
+    <img class="footer" src="$relpath^doxygen.png" alt="doxygen"/></a> $doxygenversion </li>
+  </ul>
+</div>
+<!--END GENERATE_TREEVIEW-->
+<!--BEGIN !GENERATE_TREEVIEW-->
+<hr class="footer"/><address class="footer"><small>
+$generatedby &#160;<a href="http://www.doxygen.org/index.html">
+<img class="footer" src="$relpath^doxygen.png" alt="doxygen"/>
+</a> $doxygenversion
+</small></address>
+<!--END !GENERATE_TREEVIEW-->
+</body>
+</html>