Add levigo, Go wrapper for LevelDB.

README.md

@@ -169,6 +169,7 @@ Join us on IRC at **#awesome-go** on freenode [web access](http://webchat.freeno
 * [groupcache](https://github.com/golang/groupcache) - Groupcache is a caching and cache-filling library, intended as a replacement for memcached in many cases.
 * [influxdb](https://github.com/influxdb/influxdb) - Scalable datastore for metrics, events, and real-time analytics
 * [ledisdb](https://github.com/siddontang/ledisdb) - Ledisdb is a high performance NoSQL like Redis based on LevelDB.
+* [levigo](https://github.com/jmhodges/levigo) - Levigo is a Go wrapper for LevelDB.
 * [tiedot](https://github.com/HouzuoGuo/tiedot) - Your NoSQL database powered by Golang.
 
 *Database tools.*