Add go-pg (#1204)

README.md

@@ -745,6 +745,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 *Libraries that implement Object-Relational Mapping or datamapping techniques.*
 
 * [beego orm](https://github.com/astaxie/beego/tree/master/orm) - A powerful orm framework for go. Support: pq/mysql/sqlite3.
+* [go-pg](https://github.com/go-pg/pg) - PostgreSQL ORM with focus on PostgreSQL specific features and performance.
 * [go-store](https://github.com/gosuri/go-store) - A simple and fast Redis backed key-value store library for Go.
 * [gomodel](https://github.com/cosiner/gomodel) - A lightweight, fast, orm-like library helps interactive with database.
 * [GORM](https://github.com/jinzhu/gorm) - The fantastic ORM library for Golang, aims to be developer friendly.