message: docs(readme): a bit more intuitive docs links
  Use a docs.rs badge where appropriate.
diff: [![Coverage Status](https://coveralls.io/repos/hyperium/hyper/badge.svg?branch=master)](https://coveralls.io/r/hyperium/hyper?branch=master)
  [![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](./LICENSE)
  [![crates.io](http://meritbadge.herokuapp.com/hyper)](https://crates.io/crates/hyper)
  +[![Released API docs](https://docs.rs/hyper/badge.svg)](http://docs.rs/hyper)
  -A low-level HTTP implementation for Rust.
  -
  -### Documentation
  +([Master API docs](http://hyperium.github.io/hyper/master))
  -- [Released](http://docs.rs/hyper)
  -- [Master](http://hyperium.github.io/hyper/master)
  +A low-level HTTP implementation for Rust.
  **Get started** by looking over the [guides](https://hyper.rs/guides).
  