Sync 2.14 release highlights in releases index

Change-Id: I98fa737c28734a89e1f3c51b11f5f6abd749733a

releases/README.md

diff --git a/releases/README.md b/releases/README.md
index 19d60aa..556e299 100644
--- a/releases/README.md
+++ b/releases/README.md
@@ -14,6 +14,12 @@
 
 * HTML emails and new templating framework
 
+* Support for receiving review comments by email
+
+* New [Polymer](https://www.polymer-project.org/) based user interface
+
+* Support for elliptic curve/ed25519 SSH keys
+
 [Release notes for Gerrit 2.14](/releases/2.14.md)
 
 ## 2.13 {#2.13}