*: add CHANGELOG

Add full changelog to CHANGELOG.md, which is much better for handling
the changelog than adding everything to tags which aren't as in-band as
a file in the repo.

Signed-off-by: Aleksa Sarai <asarai@suse.de>

CHANGELOG.md

@@ -0,0 +1,94 @@
+# 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]
+### Added
+- `CHANGELOG.md` has now been added. openSUSE/umoci#76
+
+## [0.0.0] - 2017-02-07
+### Added
+- Unit tests are massively expanded, as well as the integration tests.
+  openSUSE/umoci#68 openSUSE/umoci#69
+- Full coverage profiles (unit+integration) are generated to get all
+  information about how much code is tested. openSUSE/umoci#68
+  openSUSE/umoci#69
+
+### Fixed
+- Static compilation now works properly. openSUSE/umoci#64
+- 32-bit architecture builds are fixed. openSUSE/umoci#70
+
+### Changed
+- Unit tests can now be run inside `%check` of an `rpmbuild` script, allowing
+  for proper testing. openSUSE/umoci#65.
+- The logging output has been cleaned up to be much nicer for end-users to
+  read. openSUSE/umoci#73
+- Project has been moved to an openSUSE project. openSUSE/umoci#75
+
+## [0.0.0-rc3] - 2016-12-19
+### Added
+- `unpack`, `repack`: `xattr` support which also handles `security.selinux.*`
+  difficulties. openSUSE/umoci#49 openSUSE/umoci#52
+- `config`, `unpack`: Ensure that environment variables are not duplicated in
+  the extracted or stored configurations. openSUSE/umoci#30
+- Add support for read-only CAS operations for read-only filesystems.
+  openSUSE/umoci#47
+- Add some helpful output about `--rootless` if `umoci` fails with `EPERM`.
+- Enable stack traces with errors if the `--debug` flag was given to `umoci`.
+  This requires a patch to `pkg/errors`.
+
+### Changed
+- `gc`: Garbage collection now also garbage collects temporary directories.
+  openSUSE/umoci#17
+- Clean-ups to vendoring of `go-mtree` so that it's much more
+  upstream-friendly.
+
+## [0.0.0-rc2] - 2016-12-12
+### Added
+- `unpack`, `repack`: Support for rootless unpacking and repacking.
+  openSUSE/umoci#26
+- `unpack`, `repack`: UID and GID mapping when unpacking and repacking.
+  openSUSE/umoci#26
+- `tag`, `rm`, `ls`: Tag modification commands such as `umoci tag`, `umoci rm`
+  and `umoci ls`. openSUSE/umoci#6 openSUSE/umoci#27
+- `stat`: Output information about an image. Currently only shows the history
+  information. Only the **JSON** output is stable. openSUSE/umoci#38
+- `init`, `new`: New commands have been created to allow for image creation
+  from scratch. openSUSE/umoci#5 openSUSE/umoci#42
+- `gc`: Garbage collection of images. openSUSE/umoci#6
+- Full integration and unit testing, with OCI validation to ensure that we
+  always create valid images. openSUSE/umoci#12
+
+### Changed
+- `unpack`, `repack`: Create history entries automatically (with options to
+  modify the entries). openSUSE/umoci#36
+- `unpack`: Store information about its source to ensure consistency when doing
+  a `repack`. openSUSE/umoci#14
+- The `--image` and `--from` arguments have been combined into a single
+  `<path>[:<tag>]` argument for `--image`. openSUSE/umoci#39
+- `unpack`: Configuration annotations are now extracted, though there are still
+  some discussions happening upstream about the correct way of doing this.
+  openSUSE/umoci#43
+
+### Fixed
+- `repack`: Errors encountered during generation of delta layers are now
+  correctly propagated. openSUSE/umoci#33
+- `unpack`: Hardlinks are now extracted as real hardlinks. openSUSE/umoci#25
+
+### Security
+- `unpack`, `repack`: Symlinks are now correctly resolved inside the unpacked
+  rootfs. openSUSE/umoci#27
+
+## 0.0.0-rc1 - 2016-11-10
+### Added
+- Proof of concept with major functionality implemented.
+  + `unpack`
+  + `repack`
+  + `config`
+
+[Unreleased]: https://github.com/olivierlacan/keep-a-changelog/compare/v0.0.0...HEAD
+[0.0.0]: https://github.com/olivierlacan/keep-a-changelog/compare/v0.0.0-rc3...v0.0.0
+[0.0.0-rc3]: https://github.com/olivierlacan/keep-a-changelog/compare/v0.0.0-rc2...v0.0.0-rc3
+[0.0.0-rc2]: https://github.com/olivierlacan/keep-a-changelog/compare/v0.0.0-rc1...v0.0.0-rc2