This patch adds the example to explain how to register dpset.DPSet
service and how to get DPSet instance from user application in order to
call the API of DPSet.
Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>