Golang utility packages (library)

 The utilities include
 .
  bytesize: providing a way to show readable values of byte sizes by reediting
            the code from http://golang.org/doc/effective_go.html. It could
            also parsing byte size text to ByteSize object.
 .
  exec: runs external commands. It wraps os.exec to allow using full
            command string as arguments, and provides functions of providing
            (stdin, stdout, stderr) channel for (stdin, stdout, stderr) pipe.
 .
 byteutil, cliutil, math, pathutil, randutil, stringutil are further utils
 without specific documentation.