Add install section to README.md (#765)

* Add install section to README.md

* Modify lib.rs and runn cargo-sync-readme

Author: Voklen

protobuf/README.md

@@ -2,6 +2,17 @@
 
 # Library to read and write protocol buffers data
 
+## Install
+
+To get started generaing Rust code from ProtoBufs, add this to your `Cargo.toml`
+```toml
+[dependencies]
+protobuf = "3.7"
+
+[build-dependencies]
+protobuf-codegen = "3.7"
+```
+
 ## Features
 
 This crate has one feature, which is `with-bytes`.

protobuf/src/lib.rs

@@ -1,5 +1,16 @@
 //! # Library to read and write protocol buffers data
 //!
+//! ## Install
+//!
+//! To get started generaing Rust code from ProtoBufs, add this to your `Cargo.toml`
+//! ```toml
+//! [dependencies]
+//! protobuf = "3.7"
+//!
+//! [build-dependencies]
+//! protobuf-codegen = "3.7"
+//! ```
+//!
 //! ## Features
 //!
 //! This crate has one feature, which is `with-bytes`.