README and manpages for ndnping and ndnpingserver

refs #2818

Change-Id: I5ada2f4adbc234f0fdf11452560199df73a5314e
diff --git a/manpages/conf.py b/manpages/conf.py
index 20709a9..ea32680 100644
--- a/manpages/conf.py
+++ b/manpages/conf.py
@@ -8,4 +8,6 @@
 man_pages = [
     ('ndnpeek', 'ndnpeek', 'simple consumer to send one Interest and expect one Data', None, 1),
     ('ndnpoke', 'ndnpoke', 'simple producer to publish one Data', None, 1),
+    ('ndnping', 'ndnping', 'reachability testing client', None, 1),
+    ('ndnpingserver', 'ndnpingserver', 'reachability testing server', None, 1),
 ]