Added a few example based on the obsolete libraries (v0).

Updated the tutorial example.
Added WSF_MESSAGE_EXECUTION.

examples/obsolete/v0/restbucksCRUD/src/database/shared_database_api.e

@@ -0,0 +1,19 @@
+note
+	description: "Summary description for {SHARED_DATABASE_API}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	SHARED_DATABASE_API
+
+feature -- Access
+
+	db_access: DATABASE_API
+		once
+			create Result.make
+		end
+note
+	copyright: "2011-2012, Javier Velilla and others"
+	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
+end