Also, this commit imports used classes from ::ndn namespace (from
NDN-CPP library) directly to ::nfd namespace.
refs: #1163
Change-Id: I9cc9d72e00af495b4ed0c84e6d418a7c9ba986cb
This commit also update CS interface (find should return
shared_ptr<Data>, CS entry is internal to CS, the design diagrams are
corrected too).
Change-Id: Ib6377b6d9b8478640ac35d3cfb6c9180cc57c4fe
Alexander Afanasyev
Junxiao Shi