release v0.1.0

CHANGELOG.md

+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [Unreleased]
+
+## [v0.1.0] - 2016-09-27
+
+### Added
+
+- Read-Only (`RO`), Read-Write (`RW`) and Write-Only (`WO`) registers
+
+[Unreleased]: https://github.com/japaric/rustc-cfg/compare/v0.1.0...HEAD