Add `examples` folder

[mre]

trafficstars

There should be an examples folder for showing different features of the library. This would help people get up to speed quickly and show off some of the more interesting features of the library such as the soon to be added stderr support (#9).

If anyone wants to contribute a usage example, feel free to send a pull request. 😊

[mre]

Forgot to say: each example should be executable as follows:

cargo run --example myexample