add Validator

Change-Id: Ib8ce9023aad0782f934e8e6e559840b559d68208
add DbMgr again & testing data

Change-Id: I3e2153fe1d7bf68a9880b8ff533d9fe27d1e15ba
use DummyClientFace from ndn-cxx

Change-Id: I82bd668662a790d6e336bbcad9a6357606323658
daemon: add NameServer

Change-Id: I64b82a0e9351bcc15691279470c807399480a474
add NdnsUpdate

Change-Id: Ia34e0228e6e9164239f3412e5c419f965e35daec
clients: add dig

Change-Id: I78822e9d68b36973362f0790f3c2f6e676cc6b94
deploy: shell script to deploy or test

Change-Id: I290fa852179313fffb71d64a30312e92ed1ae861
tools: add ndns-demo

Change-Id: I250d7bf8a02ffec8aee3226bbf830bc3e9bbfa3f