[doc] add changelog

Author: simogasp

CHANGES.md

@@ -0,0 +1,22 @@
+# PopSift Changelog
+
+All notable changes to this project are 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]
+
+### Added
+
+### Changed
+
+### Fixed
+
+### Removed
+
+## [1.0.0] - YYYY-MM-DD
+
+- Support for cuda 9 and 10
+- Support for RTX architecture
+- Optional grid filtering