Add release notes

Author: TravisCardwell

project/release/queue-sheet-haskell-0.5.0.0.md

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+# `queue-sheet-haskell` `0.5.0.0` Release Notes
+
+Date
+: 2020-11-08
+
+## Overview
+
+This release of Queue Sheet adds support for specifying lists of tags or items
+as a string in a simplified CSV format.  Use of the CSV format can result in
+fewer changes when updating a file, making the update slightly easier to
+perform and the `git diff` output easier to read.  See the updated man page
+for details.
+
+This release also switches the Git default branch to `main`.
+
+YAML files used with version `0.4.0.0` work with version `0.5.0.0` without
+change, but YAML files that the new CSV format will not work with version
+`0.4.0.0` or before.