Add initial 0.8.0 (basically empty) CHANGELOG.md

Another release preparation.

gstreamer-app/CHANGELOG.md

+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
+specifically the [variant used by Rust](http://doc.crates.io/manifest.html#the-version-field).
+
+## [0.8.0] - 2017-08-31
+
+- Initial release of the autogenerated GStreamer bindings. Older versions
+  (< 0.8.0) of the bindings can be found [here](https://github.com/arturoc/gstreamer1.0-rs).
+  The API of the two is incompatible.
+
+[Unreleased]: https://github.com/sdroege/gstreamer-rs/compare/0.8.0...HEAD

gstreamer-audio/CHANGELOG.md

+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
+specifically the [variant used by Rust](http://doc.crates.io/manifest.html#the-version-field).
+
+## [0.8.0] - 2017-08-31
+
+- Initial release of the autogenerated GStreamer bindings. Older versions
+  (< 0.8.0) of the bindings can be found [here](https://github.com/arturoc/gstreamer1.0-rs).
+  The API of the two is incompatible.
+
+[Unreleased]: https://github.com/sdroege/gstreamer-rs/compare/0.8.0...HEAD

gstreamer-player/CHANGELOG.md

+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
+specifically the [variant used by Rust](http://doc.crates.io/manifest.html#the-version-field).
+
+## [0.8.0] - 2017-08-31
+
+- Initial release of the autogenerated GStreamer bindings. Older versions
+  (< 0.8.0) of the bindings can be found [here](https://github.com/arturoc/gstreamer1.0-rs).
+  The API of the two is incompatible.
+
+[Unreleased]: https://github.com/sdroege/gstreamer-rs/compare/0.8.0...HEAD

gstreamer-video/CHANGELOG.md

+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
+specifically the [variant used by Rust](http://doc.crates.io/manifest.html#the-version-field).
+
+## [0.8.0] - 2017-08-31
+
+- Initial release of the autogenerated GStreamer bindings. Older versions
+  (< 0.8.0) of the bindings can be found [here](https://github.com/arturoc/gstreamer1.0-rs).
+  The API of the two is incompatible.
+
+[Unreleased]: https://github.com/sdroege/gstreamer-rs/compare/0.8.0...HEAD

gstreamer/CHANGELOG.md

+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html),
+specifically the [variant used by Rust](http://doc.crates.io/manifest.html#the-version-field).
+
+## [0.8.0] - 2017-08-31
+
+- Initial release of the autogenerated GStreamer bindings. Older versions
+  (< 0.8.0) of the bindings can be found [here](https://github.com/arturoc/gstreamer1.0-rs).
+  The API of the two is incompatible.
+
+[Unreleased]: https://github.com/sdroege/gstreamer-rs/compare/0.8.0...HEAD