CHANGELOG and README updated

CHANGELOG.md

@@ -5,6 +5,20 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.0] - 2025-07-01
+
+### Added
+
+- All slide elements now have a second `ElementPosition` parameter to save vertical and horizontal hierarchy
+- `include_slide_comments` parameter to the `ParserConfig` to control the comments should be added to the Markdown or not (`<!-- Slide [n] ->`)
+
+### Changed
+
+- The parser now parses grouped elements (`<p:grpSp>`) recursively to find every base element inside of groups with `n` nested groups
+- `SlideElements` are now sorted vertically before the Markdown conversion to preserve the visual hierachy
+- `basic_usage.rs` now uses a second cmd parameter to control if images are extracted or not (for debug purposes)
+---
+
 ## [0.3.0] - 2025-06-16
 
 ### Added

README.md

@@ -130,7 +130,7 @@ Include the following line in your Cargo.toml dependencies section:
 
 ```toml
 [dependencies]
-pptx-to-md = "0.3.0"
+pptx-to-md = "0.4.0"
 ```
 
 ---