Example demonstrating how go-selfupdate works

[deinspanjer]

It took me a bit of playing to figure out how to use go-selfupdate, so I figured I'd share what I learned through an example. To run, just cd into the example directory and execute the run-example.sh script. The example leaves its files behind so the user can explore the public directory, etc.

Code is donated to the go-selfupdate project with the same license that project uses.

[sanbornm]

Thanks!