ndn-cxx, nfd: Bumping version of 0.2.0-rc2

nlsr: Bumping to the latest release

ndn-tlv-ping, ndn-traffic-generator, ndndump, repo-ng: Bumping ppa version to
force rebuild against the latest version of the library.
diff --git a/ndn-traffic-generator/Makefile b/ndn-traffic-generator/Makefile
index 0d6021a..cf68a41 100644
--- a/ndn-traffic-generator/Makefile
+++ b/ndn-traffic-generator/Makefile
@@ -11,6 +11,6 @@
 VERSION=0.0.1
 
 # PPA version
-PPA_VERSION=2
+PPA_VERSION=3
 
 include ../packaging.mk