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/repo-ng/debian/control b/repo-ng/debian/control
index 0073662..f060516 100644
--- a/repo-ng/debian/control
+++ b/repo-ng/debian/control
@@ -4,7 +4,7 @@
 Build-Depends: debhelper (>= 8.0.0),
  python (>= 2.7.0),
  pkg-config (>= 0.26),
- ndn-cxx-dev (>= 0.2.0~rc1.1)
+ ndn-cxx-dev (>= 0.2.0~rc2)
 Standards-Version: 3.9.2
 Section: net
 Homepage: http://github.com/named-data/repo-ng