* Better example code for google protos

* Try fix windows build

* Try fix windows build

* Remove generated code in repo

updated tutorial to use tokio 1.x.

#549)

Bumps routeguide tutorial dependency to tokio 1.0 for compatability with
tonic 0.4. Also adds required rt-multi-thread feature and drops unused
and now unsupported stream feature.

Signed-off-by: hasheddan <georgedanielmangum@gmail.com>

In tower 0.4.0 we missed a couple of re-exports that tonic 0.4.0 depends
on. So tonic really depends on tower at least version 0.4.1. Since
specifying your tower depedency as 0.4 means you might get 0.4.0, you
might get build errors when updating tonic. Such as [#553] and [#552].

This fixes that by bumping tonic's dependency on tower to 0.4.4. That
means users will get at least tower version 0.4.4, but semver compatible
updates are still allowed.

Fixes #553

[#553]: #553
[#552]: #552

This is particularly handy when combined with `clap::value_t`.

Here's demo of it working with Clap:

```bash
cargo +stable init --bin tonic-demo
cd tonic-demo
cat <<-EOF >> Cargo.toml
  clap = "*"
  tonic = { path = "../hyperium/tonic/tonic" }
EOF
cat <<-EOF > src/main.rs
    use clap::{value_t, App, Arg};
    use tonic::transport::Endpoint;
    fn main() {
        let matches = App::new("tonic-demo")
            .arg(Arg::with_name("host"))
            .get_matches();
        let x = value_t!(matches.value_of("host"), Endpoint);
        println!("{:?}", x);
    }
EOF
cargo +stable run -- https://127.0.0.1:443
```

Signed-off-by: Ana Hobden <operator@hoverbear.org>

Co-authored-by: Samani G. Gikandi <samani@gojulas.com>