Add badges and install cargo readme

Author: fitzgen

.travis.yml

@@ -5,6 +5,7 @@ rust:
   - nightly
 
 script:
+  - cargo install -f cargo-readme
   - cargo test
   - rustup target add wasm32-unknown-unknown --toolchain nightly
   - cargo build --target wasm32-unknown-unknown

README.md

@@ -1,5 +1,8 @@
 ## `console_error_panic_hook`
 
+[![](https://docs.rs/console_error_panic_hook/badge.svg)](https://docs.rs/console_error_panic_hook/)
+[![](https://img.shields.io/crates/v/console_error_panic_hook.svg)](https://crates.io/crates/console_error_panic_hook)
+[![](https://img.shields.io/crates/d/console_error_panic_hook.png)](https://crates.io/crates/console_error_panic_hook)
 [![Build Status](https://travis-ci.org/rustwasm/console_error_panic_hook.svg?branch=master)](https://travis-ci.org/rustwasm/console_error_panic_hook)
 
 This crate lets you debug panics on `wasm32-unknown-unknown` by providing a

src/lib.rs

@@ -1,5 +1,8 @@
 //! # `console_error_panic_hook`
 //!
+//! [![](https://docs.rs/console_error_panic_hook/badge.svg)](https://docs.rs/console_error_panic_hook/)
+//! [![](https://img.shields.io/crates/v/console_error_panic_hook.svg)](https://crates.io/crates/console_error_panic_hook)
+//! [![](https://img.shields.io/crates/d/console_error_panic_hook.png)](https://crates.io/crates/console_error_panic_hook)
 //! [![Build Status](https://travis-ci.org/rustwasm/console_error_panic_hook.svg?branch=master)](https://travis-ci.org/rustwasm/console_error_panic_hook)
 //!
 //! This crate lets you debug panics on `wasm32-unknown-unknown` by providing a