Go bob walker, go!

Port bob walker to Go.

Handle sleeping while in drunk mode and add a turbo mode for true parallelism.
You could replace this whole section of code with the following:

```go
var drunkMode, sportMode, turboMode bool
flag.BoolVar(&drunkMode, "d", false, "Drunk mode!")
flag.BoolVar(&sportMode, "s", false, "Sport mode!")
flag.BoolVar(&turboMode, "t", false, "Turbo mode!")
flag.Parse()
```

and `flag` gives you a usage function for free when the program is called with `-h` or `--help`.