Make simple examples, without external dependencies

[jcbritobr]

This book has a lot of complex examples. Its dificult to understand the code proprosal. Please, make simple examples available at the beginning.

[andradei]

Especially when the dependencies keep changing their APIs fast towards stability.

[cannero]

Which examples do you think could be used? Maybe I'm totally wrong as I'm only a beginner in async rust, but I believe that the problem is that only the Future trait is in std. For an executor a crate like futures, async-std or tokio has to be used.