Go bob walker, go!

Port bob walker to Go.

Handle sleeping while in drunk mode and add a turbo mode for true parallelism.
They can be whatever length you like but:

- You have to call flag for each
- They always have a single hyphen

From the examples:
```
	flag.StringVar(&gopherType, "gopher_type", defaultGopher, usage)
	flag.StringVar(&gopherType, "g", defaultGopher, usage+" (shorthand)")
```