Update changelog

CHANGELOG.md

@@ -4,21 +4,25 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## 0.2.2 - Unreleased
+## 0.3 - Unreleased
 
 ### Added
 
 - `flake8` configuration
 - `flake8` checks in the Travis build
-- `utils` module
+- `utils` and `io` modules
+- `create_centerlines` script and function for creating centerlines that is format agnotic. All OGR vector file formats should be supported.
 
 ### Changed
 
 - The `Centerline` class extends Shapely's `MultiLineString` class
+- Replaced the `shp2centerline` script with `create_centerlines`
 
 ### Removed
 
-- Support for `GDAL<=2.0.1`
+- Support for `GDAL<2.0`
+- Support for `Fiona<1.7`
+- `shp2centerline` script
 
 
 ## 0.2.1 - 2017-06-18