docs: Documentation update, initial preparation for version 2.1 release

Change-Id: I3694a8791b9540fc1b926a83ff55421b47e0f1e2
diff --git a/docs/ns3_html_theme/theme.conf b/docs/ns3_html_theme/theme.conf
index 3c06cc4..580a0ac 100644
--- a/docs/ns3_html_theme/theme.conf
+++ b/docs/ns3_html_theme/theme.conf
@@ -4,7 +4,7 @@
 pygments_style = sphinx
 
 [options]
-projectname = ndnSIM 2.0
+projectname = ndnSIM
 homepage = http://ndnsim.net/
 homepage2 = http://irl.cs.ucla.edu/
 apidocs = ndnSIM API
@@ -15,7 +15,7 @@
 # logo = ns-3-inverted-notext-small.png
 logoalt = ns-3 Logo
 projectbrief = NS-3 based Named Data Networking (NDN) simulator
-projectnumber = ndnSIM 2.0: NDN, CCN, CCNx, content centric networks
+projectnumber = ndnSIM: simulation of NDN, ICN, Information-Centric Networking
 
 favicon = favicon.ico
 docstitle = Documentation