Rust Etcd Versions Save

New features:

• Added methods for the self statistics and store statistics APIs.
• Added an EtcdResult type for results that may return an etcd error.

Improvements:

• The crate can now be built against both stable (with code generation) and nightly (with compiler plugins).
• Updates for the latest code generation dependencies and etcd 2.2.5.

Breaking changes:

• Types are now divided into public modules. Only the most commonly used types are reexported from the crate root.
• Types that can be deserialized now use Serde (Deserialize) instead of rustc-serialize (RustcDecodable).
• etcd::Client::get has an additional boolean argument, strong_consistency.

Improvements:

• Clarified some details in the documentation.

Initial release.