Add a first stab at a change log.

To help us all keep a handle on the changes going down.

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+---
+
+## [0.0.2] - 2018-11-18
+
+Deployed on:
+* https://books.vvvvvvaria.org/
+
+### Added
+* Use [Pipenv](https://pipenv.readthedocs.io/en/latest/) for dependency management.
+* A bootstrap [scripts](scripts) folder for running development server and shell.
+* Add a dummy test suite which uses [pytest](https://docs.pytest.org/en/latest/).
+* An [Ansible](https://docs.ansible.com/) deployment method in the [ansible](ansible) folder.
+* Add documentation in [README.md](README.md) and [ansible/README.md](ansible/README.md).
+
+### Changed
+* Move all application source code into the [xppl](xppl) folder.
+* Bootstrap the application via [xppl/app.py](xppl/app.py).
+* Added [Makefile](Makefile) targets for installing [RQLite](https://github.com/rqlite/rqlite).
+* Run [isort](https://isort.readthedocs.io/en/latest/) and [pylava](https://github.com/pylava/pylava)
+  code audit tools over the source to use PEP 8 style, catch any erroneous
+  imports, unused variables etc. with some basic static analysis.
+* Use a new [Hypothesis](https://web.hypothes.is/) API key.
+
+### Fixed
+* A bug in the scrolling homepage message where missing information resulted in a NoneType error.
+
+### Removed
+* The `import_csv.py` since we'll probably use [Alembic](https://alembic.sqlalchemy.org/en/latest/) migrations instead.
+* The `rebuild.py` since it appears the application doesn't use [Whoosh](https://whoosh.readthedocs.io/en/latest/intro.html) any more.
+* The basic `init.py` which originally built the database. Done in [xppl/app.py](xppl/app.py) now.
+
+## [0.0.1] - 2018-10-29
+
+* Initial release. No change log entries.