Update cookbook plugin to latest revision

- Update GWT to 2.6.0
- Add weblink example

Change-Id: I9fe7f39dfc3dabc6f3e8382b5cf81b984267af96
diff --git a/plugins/cookbook-plugin b/plugins/cookbook-plugin
index eb8f797..0fcd7d8 160000
--- a/plugins/cookbook-plugin
+++ b/plugins/cookbook-plugin
@@ -1 +1 @@
-Subproject commit eb8f7977c2c49cfda615b5b205e23d7e9c1818fd
+Subproject commit 0fcd7d81d6534ee93bdd4af987ebff188152b65b