Add spew

README.md

@@ -574,6 +574,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 * [seelog](https://github.com/cihub/seelog) -   logging functionality with flexible dispatching, filtering, and formatting.
 * [slf](https://github.com/ventu-io/slf) - The Structured Logging Facade (SLF) for Go (like SLF4J but structured and for Go)
 * [slog](https://github.com/ventu-io/slog) - The reference implementation of the Structured Logging Facade (SLF) for Go
+* [spew](https://github.com/davecgh/go-spew) - Implements a deep pretty printer for Go data structures to aid in debugging
 * [stdlog](https://github.com/alexcesaro/log) - Stdlog is an object-oriented library providing leveled logging. It is very useful for cron jobs.
 * [tail](https://github.com/hpcloud/tail) - A Go package striving to emulate the features of the BSD tail program.
 * [xlog](https://github.com/xfxdev/xlog) - Plugin architecture and flexible log system for Go, with level ctrl, multiple log target and custom log format.