Clarify that serde is supported

Closes #122

README.md

@@ -17,6 +17,37 @@ date with the TOML specification as changes happen.
 toml = "0.2"
 ```
 
+By default this crate supports [`rustc-serialize`] style serialization. This can
+be disabled though by disabling the default feature set:
+
+[`rustc-serialize`]: http://github.com/rust-lang/rustc-serialize
+
+```toml
+# Cargo.toml
+[dependencies]
+toml = { version = "0.2", default-features = false }
+```
+
+If you'd like to enable support for [serde] you can enable the `serde` feature:
+
+[serde]: https://github.com/serde-rs/serde
+
+```toml
+# Cargo.toml
+[dependencies]
+toml = { version = "0.2", features = ["serde"] }
+```
+
+If you'd like to *only* support serde, you can also write:
+
+[serde]: https://github.com/serde-rs/serde
+
+```toml
+# Cargo.toml
+[dependencies]
+toml = { version = "0.2", features = ["serde"], default-features = false }
+```
+
 # License
 
 `toml-rs` is primarily distributed under the terms of both the MIT license and

src/lib.rs

@@ -34,6 +34,15 @@
 //!
 //! [1]: https://github.com/mojombo/toml
 //! [2]: https://github.com/BurntSushi/toml-test
+//!
+//! # Encoding support
+//!
+//! This crate optionally supports the [`rustc-serialize`] crate and also the
+//! [`serde`] crate through respective feature names. The `rustc-serialize`
+//! feature is enabled by default.
+//!
+//! [`rustc-serialize`]: http://github.com/rust-lang/rustc-serialize
+//! [`serde`]: http://github.com/serde-rs/serde
 
 #![doc(html_root_url = "http://alexcrichton.com/toml-rs")]
 #![deny(missing_docs)]