docs: Add release notes and final documentation corrections

Change-Id: Ic8010b536c36d84e26f4d9ea6384f81e869e1407
diff --git a/VERSION b/VERSION
index 854f6d0..227cea2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-ndnSIM version 0.2.8
+2.0.0