added gomemcache on database drive section

develop by @bradfitz

README.md

@@ -70,7 +70,8 @@ A curated list of awesome Go frameworks, libraries and software. Inspired by [aw
     * [mgo](http://labix.org/mgo) - MongoDB driver for the Go language that implements a rich and well tested selection of features under a very simple API following standard Go idioms.
     * [redis](https://github.com/hoisie/redis) - A simple, powerful Redis client for Go.
     * [Neo4j-GO](https://github.com/davemeehan/Neo4j-GO) - Neo4j REST Client in golang.
-    * [gocouch](https://github.com/hoisie/gocouch) - Couchdb client for Go
+    * [gocouch](https://github.com/hoisie/gocouch) - Couchdb client for Go.
+    * [gomemcache](https://github.com/bradfitz/gomemcache/) - memcache client library for the Go programming language.
 
 
 ## Imagery