Update docs.

README.md

@@ -47,6 +47,8 @@ Sharding-JDBC is a JDBC extension, provides distributed features such as shardin
 
 ![Architecture](http://dangdangdotcom.github.io/sharding-jdbc/img/architecture_en.png)
 
+# [Release Notes](https://github.com/dangdangdotcom/sharding-jdbc/releases)
+
 # [Roadmap](ROADMAP.md)
 
 # Quick Start

sharding-jdbc-doc/content/00-overview/release-notes.md

 +++
 toc = true
 date = "2016-12-06T22:38:50+08:00"
-title = "Release Note"
+title = "Release Notes"
 weight = 2
 prev = "/00-overview/intro"
 next = "/00-overview/contribution"