Removing deprecated packages

Change-Id: I7e7145020ccc036dbcaf0d8ef220793919210324
nfd + ndn-cxx: New ports

Change-Id: I7ea6eba5828fca96409117debdcb8a0af87e5ff4
ndnping: Updating port to use ndn-tlv-ping

Change-Id: I75d7a169251841c1104b04ca762400ee904fcb9f
repo-ng: Preliminary port for repo-ng (no initial configuration)

Change-Id: Ia520b151a8e00e8cd843dc662c31ff2d5e2fdbdb