invalid cli/server READMEs on crates

Let's make our READMEs: [cli/README.md](https://github.com/h1alexbel/fakehub/tree/master/cli), [server/README.md](https://github.com/h1alexbel/fakehub/tree/master/server) valid on [crates.io](https://crates.io). Let's include full links, installation, examples, and so on.