Add getContact method of ContactManager, add supporting methods in ContactStorage
diff --git a/src/contact-manager.h b/src/contact-manager.h
index 666cf9b..465a1cc 100644
--- a/src/contact-manager.h
+++ b/src/contact-manager.h
@@ -46,6 +46,9 @@
   getContactStorage()
   { return m_contactStorage; }
 
+  ndn::Ptr<ContactItem>
+  getContact(const ndn::Name& contactNamespace);
+
   inline ndn::Ptr<DnsStorage>
   getDnsStorage()
   { return m_dnsStorage; }