Update changelog to v0.5.3

Author: SamLau95

CHANGELOG.md

@@ -5,15 +5,17 @@ All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+None yet.
 
-## v0.4.0
-### Added
-- This CHANGELOG file!
-- Docs are now up on [readthedocs][rtd].
-- [`util.table_apply` function][table_apply]
+## v0.5.3
+### Changed
+- Allow charting methods to select particular columns and default to
+  `overlay=True` (#193)
+- Make the `values` arg for `pivot` optional. Counting is the default behavior.
+  (#191)
 
-[rtd]: http://datascience.readthedocs.org/en/latest/index.html
-[table_apply]: https://github.com/data-8/datascience/blob/f7c11b5132299dab0c75a5862cdab9c5b619c7e5/datascience/util.py#L62-L82
+### Removed
+- The query manager (`Q` class) is removed since no one used it, ever.
 
 ## v0.5.1
 ### Added
@@ -32,3 +34,13 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Table.column_labels renamed to labels
 - Table.values renamed to column
 - Table.with_relabeling renamed to relabeled
+
+## v0.4.0
+### Added
+- This CHANGELOG file!
+- Docs are now up on [readthedocs][rtd].
+- [`util.table_apply` function][table_apply]
+
+[rtd]: http://datascience.readthedocs.org/en/latest/index.html
+[table_apply]: https://github.com/data-8/datascience/blob/f7c11b5132299dab0c75a5862cdab9c5b619c7e5/datascience/util.py#L62-L82
+