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
clients: add dig

Change-Id: I78822e9d68b36973362f0790f3c2f6e676cc6b94
add NdnsUpdate

Change-Id: Ia34e0228e6e9164239f3412e5c419f965e35daec
patch ns

Change-Id: Iaa5d79fae3433b27810056102330cfa8e92b3653
mgmt: management tools

refs #2034

Change-Id: I43ff11e0aa7e67f6207e75f139b7417779590efc
tools:management tools

refs #2034

Change-Id: Ib110e2d0e1214c3e95408a7f4d4679395e519319