Added to_nsq tool - Addresses #304

Added a simple `to_nsq` tool that scans from `stdin` and publishes them.
Actually - that was feedback for users. I love tools that are composible (just by piping one thing to another) but I think the logging output kind of breaks that here anyway.  Also, what do you think of line 36?  `logger = log.New(os.Stdout, "", log.LstdFlags)`

In other tools, this goes out to `os.Stderr` - should this?