Make Custom Panel example build and run

git-svn-id: https://svn.apache.org/repos/asf/incubator/ooo/trunk@1350448 13f79535-47bb-0310-9956-ffa450edef68

Move Custom Panel example to the SDK

git-svn-id: https://svn.apache.org/repos/asf/incubator/ooo/trunk@1350441 13f79535-47bb-0310-9956-ffa450edef68