Added CHANGELOG.md

Written in http://keepachangelog.com/ recommended style.

Author: ymmt2005

CHANGELOG.md

@@ -0,0 +1,35 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+## [Unreleased]
+### Added
+- aptuitl now adopts [github.com/cybozu-go/cmd][cmd] framework.  
+  As a result, commands implement [the common spec][spec].
+- [cacher] added `listen_address` configuration parameter to specify listening address (#9).
+- [cacher] added `log` configuration section to specify logging options.
+- [mirror] added `log` configuration section to specify logging options.
+
+### Changed
+- aptutil now requires Go 1.7 or better.
+
+### Removed
+- [cacher] `-s` and `-l` command-line flags are gone.
+- [mirror] `-s` command-line flag is gone.
+
+## [1.1.0]
+### Changed
+- Update docs (kudos to @xipmix).
+- [cacher] extend Release file check interval from 15 to 600 seconds (#8).
+
+## [1.0.1]
+### Changed
+- [mirror] ignore Sources if `include_source` is not specified in mirror.toml.  
+  This works as a workaround for some badly configured web servers.
+
+
+[cmd]: https://github.com/cybozu-go/cmd
+[spec]: https://github.com/cybozu-go/cmd/blob/master/README.md#specifications
+[Unreleased]: https://github.com/cybozu-go/aptutil/compare/v1.1.0...HEAD
+[1.1.0]: https://github.com/cybozu-go/aptutil/compare/v1.0.1...v1.1.0
+[1.0.1]: https://github.com/cybozu-go/aptutil/compare/v1.0.0...v1.0.1