chore: add release notes

Author: JeanMertz

CHANGELOG.md

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+# Changelog
+
+All notable changes to **[Rusty Rockets]** are documented in this file.
+
+The format is based on [Keep a Changelog], and this project adheres to [Semantic
+Versioning]. The file is auto-generated using [Conventional Commits].
+
+## [Unreleased]
+
+_nothing new to show for… yet!_
+
+## [0.1.0]
+
+- date: 2019-08-02
+- name: GFX Tutorial, Part I
+
+### Description
+
+The first in a long sequence of _prototyping releases_. Every release will
+change a tiny bit of the application, starting with nothing related to the game
+at all, slowly building towards something that takes on a familiar shape,
+representing what is described in the design documentation.
+
+In the first couple of releases, the GFX tutorial is completed step by step, to
+get a feel for the low-level graphics programming requirements.
+
+![Screenshot #1](https://github.com/rustic-games/prototype/raw/master/assets/marketing/releases/v0.1.0/screenshot.png?sanitize=true)
+
+### Contributions
+
+This release was made possible by the following people (in alphabetical order).
+Thank you all for your contributions. Your work – no matter how significant – is
+greatly appreciated by the community. ❤️
+
+- [Jean Mertz] \(<[email protected]>\)
+
+### Changes
+
+#### Game Features
+
+- "Learn gfx-hal" chapters 1, 2 & 3 [fa74d27]
+
+#### _Unchanged_
+
+_The following categories contain no changes in this release: bug fixes,
+documentation, tests, performance improvements, refactoring, code styling._
+
+<!-- [contributors] -->
+
+[jean mertz]: https://github.com/JeanMertz
+
+<!-- [releases] -->
+
+[unreleased]: https://github.com/rustic-games/prototype/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/rustic-games/prototype/releases/tag/v0.1.0
+
+<!-- [commits] -->
+
+[fa74d27]: https://github.com/rustic-games/prototype/commit/fa74d27da60e78f4a8c85b86a4a431ccf7b43210
+
+<!-- [references] -->
+
+[rusty rockets]: https://rustic.games/
+[keep a changelog]: https://keepachangelog.com/en/1.0.0/
+[semantic versioning]: https://semver.org/spec/v2.0.0.html
+[conventional commits]: https://www.conventionalcommits.org/en/v1.0.0-beta.4/