Preparing 0.4.0 release

Author: Alexander Obuhovich

CHANGELOG.md

@@ -4,6 +4,16 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 ### Added
+...
+
+### Changed
+...
+
+### Fixed
+...
+
+## [0.4.0] - 2018-02-11
+### Added
 - Added `conflicts` command for manually managing list of recorded conflicts in a working copy.
 - Added `--ignore-externals` option to `update` command to allow updating working copy without checking out externals.
 - Added `--revision` option to `update` command to allow updating working copy to a specific revision.