Reformat existing changelog adhering to keepachangelog.com

CHANGELOG.rst

 Changelog
 =========
 
-`2.0a2`_
---------
-
-New features
-~~~~~~~~~~~~
-
-* Frontend-ased announcement management
-* Auto-create Person on User creation
-* Select primary group by pattern if unset
-* Shortcut to personal information page
-* Support for defining group types
-* Add description to Person
-* age_at method and age property to Person
-* Synchronise AlekSIS groups with Django groups
-* Add celery worker, celery-beat worker and celery broker to docker-compose setup
-* Global search
-* License information page
-* Roles and permissions
-* User preferences
-* Additional fields for people per group
-* Support global permission flags by LDAP group
-* Persistent announcements
-* Custom menu entries (e.g. in footer)
-* New logo for AlekSIS
-* Two factor authentication with Yubikey, OTP or SMS
-* Devs: Add ExtensibleModel to allow apps to add fields, properties
-* Devs: Support multiple recipient object for one announcement
-
-Minor changes
-~~~~~~~~~~~~~
-
-* Make short_name for group optional
-* Generalised live loading of widgets for dashboard
-* Devs: Add some CSS helper classes for colours
-* Devs: Mandate use of AlekSIS base model
-* Devs: Drop import_ref field(s); apps shold now define their own reference fields
-
-Bug fixes
-~~~~~~~~~
-
-* DateTimeField Announcement.valid_from received a naive datetime
-* Enable SASS processor in production
-* Fix too short fields
-* Load select2 locally
-
-`2.0a1`_
---------
-
-New features
-~~~~~~~~~~~~
-
-* Migrate to materialize.css
-* Dashboard
-* Notifications via SMS (Twilio), Email or on the dashboard
-* Admin interface
-* Turn into installable, progressive web app
-* Devs: Background Tasks with Celery
-
-Minor changes
-~~~~~~~~~~~~~
+All notable changes to this project will be documented in this file.
 
-* Customisable save_button template
-* Redesign error pages
+The format is based on `Keep a Changelog`_,
+and this project adheres to `Semantic Versioning`_.
 
-Bug fixes
-~~~~~~~~~
-
-* setup_data no longer forces database connection
-
-`1.0a4`_
+`2.0a2`_ - 2020-05-04
 --------
 
-New features
-~~~~~~~~~~~~
+Added
+~~~~~
+
+* Frontend-ased announcement management.
+* Auto-create Person on User creation.
+* Select primary group by pattern if unset.
+* Shortcut to personal information page.
+* Support for defining group types.
+* Add description to Person.
+* age_at method and age property to Person.
+* Synchronise AlekSIS groups with Django groups.
+* Add celery worker, celery-beat worker and celery broker to docker-compose setup.
+* Global search.
+* License information page.
+* Roles and permissions.
+* User preferences.
+* Additional fields for people per group.
+* Support global permission flags by LDAP group.
+* Persistent announcements.
+* Custom menu entries (e.g. in footer).
+* New logo for AlekSIS.
+* Two factor authentication with Yubikey, OTP or SMS.
+* Devs: Add ExtensibleModel to allow apps to add fields, properties.
+* Devs: Support multiple recipient object for one announcement.
+
+Changes
+~~~~~~~
+
+* Make short_name for group optional.
+* Generalised live loading of widgets for dashboard.
+* Devs: Add some CSS helper classes for colours.
+* Devs: Mandate use of AlekSIS base model.
+* Devs: Drop import_ref field(s); apps shold now define their own reference fields.
+
+Fixed
+~~~~~
+
+* DateTimeField Announcement.valid_from received a naive datetime.
+* Enable SASS processor in production.
+* Fix too short fields.
+* Load select2 locally.
+
+`2.0a1`_ - 2020-02-01
+---------------------
+
+Added
+~~~~~
+
+* Migrate to MaterializeCSS.
+* Dashboard.
+* Notifications via SMS (Twilio), Email or on the dashboard.
+* Admin interface.
+* Turn into installable, progressive web app.
+* Devs: Background Tasks with Celery.
+
+Changed
+~~~~~~~
+
+* Customisable save_button template.
+* Redesign error pages.
+
+Fixed
+~~~~~
+
+* setup_data no longer forces database connection.
+
+`1.0a4`_ - 2019-11-25
+---------------------
+
+Added
+~~~~~
 
 * Two-factor authentication with TOTP (Google Authenticator), Yubikey, SMS
   and phone call.
 * Devs: CRUDMixin provides a crud_event relation that returns all CRUD
-  events for an object
+  events for an object.
 
-`1.0a2`_
---------
+`1.0a2`_ - 2019-11-11
+---------------------
 
-New features
-~~~~~~~~~~~~
+Added
+~~~~~
 
 * Devs: Add ExtensibleModel to allow injection of methods and properties into models.
 
 
-`1.0a1`_
---------
-
-New features
-~~~~~~~~~~~~
-
-* Devs: Add API to get an audit trail for any school-related object
-* Devs: Provide template snippet to display an audit trail
-* Devs: Provide base template for views that allow browsing back/forth
-* Add management command and Cron job for full backups
-* Add system status overview page
-* Allow enabling and disabling maintenance mode from frontend
-* Allow editing the dates of the current school term
-* Add logo to school information
-* Allow editing school information
-* Ensure all actions are reverted if something fails (atomic requests)
+`1.0a1`_ - 2019-09-17
+---------------------
 
-Bugfixes
-~~~~~~~~
+Added
+~~~~~
 
-* Only show active persons in group and persons views
-* Silence KeyError in get_dict template tag
+* Devs: Add API to get an audit trail for any school-related object.
+* Devs: Provide template snippet to display an audit trail.
+* Devs: Provide base template for views that allow browsing back/forth.
+* Add management command and Cron job for full backups.
+* Add system status overview page.
+* Allow enabling and disabling maintenance mode from frontend.
+* Allow editing the dates of the current school term.
+* Add logo to school information.
+* Allow editing school information.
+* Ensure all actions are reverted if something fails (atomic requests).
 
-Minor changes
-~~~~~~~~~~~~~
+Fixed
+~~~~~
 
-* Use bootstrap buttons everywhere
+* Only show active persons in group and persons views.
+* Silence KeyError in get_dict template tag.
+* Use bootstrap buttons everywhere.
 
+.. _Keep a Changelog: https://keepachangelog.com/en/1.0.0/
+.. _Semantic Versioning: https://semver.org/spec/v2.0.0.html
 
-_`1.0a1`: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/1.0a1
-_`1.0a2`: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/1.0a2
-_`1.0a4`: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/1.0a4
-_`2.0a1`: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.0a1
-_`2.0a2`: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.0a2
+.. _1.0a1: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/1.0a1
+.. _1.0a2: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/1.0a2
+.. _1.0a4: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/1.0a4
+.. _2.0a1: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.0a1
+.. _2.0a2: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.0a2
+.. _2.0b0: https://edugit.org/AlekSIS/Official/AlekSIS/-/tags/2.0b0