Documentation - Mention rust backend & update miniz and flate info

README.md

@@ -6,9 +6,13 @@
 [![Documentation](https://docs.rs/flate2/badge.svg)](https://docs.rs/flate2)
 
 A streaming compression/decompression library for Rust. The underlying
-implementation by default uses [`miniz`](https://code.google.com/p/miniz/) but
+implementation by default uses [`miniz`](https://github.com/richgel999/miniz) but
 can optionally be configured to use the system zlib, if available.
 
+There is also an experimental rust backend that uses the
+[`miniz_oxide`](https://crates.io/crates/miniz_oxide) crate. This avoids the need
+to build C code, but hasn't gone through as much testing as the other backends.
+
 Supported formats:
 
 * deflate
@@ -28,6 +32,13 @@ Using zlib instead of miniz:
 flate2 = { version = "0.2", features = ["zlib"], default-features = false }
 ```
 
+Using the rust back-end:
+
+```toml
+[dependencies]
+flate2 = { version = "0.2", features = ["rust_backend"], default-features = false }
+```
+
 ## Compression
 
 ```rust

src/lib.rs

@@ -1,13 +1,14 @@
 //! A DEFLATE-based stream compression/decompression library
 //!
-//! This library is meant to supplement/replace the standard distributon's
-//! libflate library by providing a streaming encoder/decoder rather than purely
+//! This library is meant to supplement/replace the
+//! `flate` library that was previously part of the standard rust distribution
+//! providing a streaming encoder/decoder rather than purely
 //! an in-memory encoder/decoder.
 //!
-//! Like with [`libflate`], flate2 is based on [`miniz.c`][1]
+//! Like with [`flate`], flate2 is based on [`miniz.c`][1]
 //!
-//! [1]: https://code.google.com/p/miniz/
-//! [`libflate`]: https://docs.rs/crate/libflate/
+//! [1]: https://github.com/richgel999/miniz
+//! [`flate`]: https://github.com/rust-lang/rust/tree/1.19.0/src/libflate
 //!
 //! # Organization
 //!