add documentation to Cargo.toml

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Added
+
+- Documentation link to Cargo metadata.
+
 ## [v0.1.0] - 2016-09-27
 
 ### Added

Cargo.toml

 [package]
 authors = ["Jorge Aparicio <japaricious@gmail.com>"]
+documentation = "https://docs.rs/volatile-register"
 description = "Volatile access to memory mapped hardware registers"
 license = "MIT OR Apache-2.0"
 keywords = ["volatile", "register"]