Updated changelog

Author: LiamOS

CHANGELOG.md

@@ -6,19 +6,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to a modified version of [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 Geometry releases will be tagged as `Descriptive_tag_v_X.Y.Z`.
 
-## [Unreleased]
-### Changed
-- Fixes to make larsoft work. Specifically scaling.
-
-## [Unreleased] - 2023-03-27
-### Fixed
+## [Version 0.1] - 2023-12-13
+- Areal density calculation fixed, affected Muon KE reconstruction
+- Fixes to make larsoft work. Specifically scaling/units.
 - Bugfix for infinite loop when a hit is outside volDetEnclosure
-
-## [Unreleased] - 2023-03-17
-### Added
-- Timing simulation
-- Time slicer
-- Simple event display
+- Implemented simple timing simulation
+- Added time slicer
+- Added basic event display
+- Added make_hists.py and draw_spill.py plotting scripts to provide examples in using the output
+- Allow addressing bars as x, y, u, v; u/v are the +-3 degree planes
+- Fix to optical fibre length in simulation
+- Various minor bugfixes
 
 ## [TMSonlyFreeze] - 2022-03-01
 - Tag for frozen TMS reconstruction. Used for the flux studies on TMS only