Please add build instructions

[Resonanz]

Please add the following noob build instructions into the Examples section of README.md:

How to run example code, for example "list_ports.rs":

cargo run --example list_ports

[RossSmyth]

I don't think there's any reason to. That is a Cargo concern. One will learn how just by learning Rust or typing cargo --help.

https://doc.rust-lang.org/cargo/reference/cargo-targets.html

[sirhcel]

You are right @RossSmyth, this is about Rust basics.

On the other hand are we already providing an example of how to build the crate without default features in the README's Overview section. So I'm not against adding another example for list_ports there for a quick start with quick success.

Please feel free to open a PR @Resonanz.