Fix broken links and links that lead to redirects

Remove unused eclipse sidebar file.
diff --git a/_navigation.php b/_navigation.php
index dea8b96..72b7556 100644
--- a/_navigation.php
+++ b/_navigation.php
@@ -10,7 +10,7 @@
       ),
       "about-project" => array(
         "label" => "<span class='nav-redirect'>About this project</span>",
-        "url" => "http://eclipse.org/projects/project.php?id=rt.rap"
+        "url" => "http://projects.eclipse.org/projects/rt.rap"
       )
     )
   ),