tools: implement 'nfdc cs info' command

refs #4219

Change-Id: I4252878943c3f6c88f306f83f5023fffc82326b0
diff --git a/docs/conf.py b/docs/conf.py
index f3fec93..4b0e9e1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -246,6 +246,7 @@
     ('manpages/nfdc-status', 'nfdc-status', u'show NFD status', None, 1),
     ('manpages/nfdc-face', 'nfdc-face', u'show and manipulate NFD faces', None, 1),
     ('manpages/nfdc-route', 'nfdc-route', u'show and manipulate NFD routes', None, 1),
+    ('manpages/nfdc-cs', 'nfdc-cs', u'show and manipulate NFD Content Store', None, 1),
     ('manpages/nfdc-strategy', 'nfdc-strategy', u'show and manipulate NFD strategy choices', None, 1),
     ('manpages/nfd-status', 'nfd-status', u'comprehensive report of NFD status', None, 1),
     ('manpages/nfd-status-http-server', 'nfd-status-http-server',