Add markdown links to version tags on version headers.

CHANGELOG.md

@@ -1,7 +1,16 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
-## 0.0.4 - 2014-08-09
+## [Unreleased][head]
+- No significant changes.
+
+## [0.0.5][v0.0.5] - 2014-08-09
+### Added
+- Markdown links to version tags on release headings
+- Unreleased section to gather unreleased changes and encourage note
+keeping prior to releases.
+
+## [0.0.4][v0.0.4] - 2014-08-09
 ### Added
 - Better explanation of the difference between the file ("CHANGELOG")
 and its function "the change log".
@@ -17,15 +26,15 @@ create too much noise in the file. People will have to assume that the
 missing sections were intentionally left out because they contained no
 notable changes.
 
-## 0.0.3 - 2014-08-09
+## [0.0.3][v0.0.3] - 2014-08-09
 ### Added
 - "Why should I care?" section mentioning The Changelog podcast.
 
-## 0.0.2 - 2014-07-10
+## [0.0.2][v0.0.2] - 2014-07-10
 ### Added
 - Explanation of the recommended reverse chronological release ordering.
 
-## 0.0.1 - 2014-05-31
+## [0.0.1][v0.0.1] - 2014-05-31
 ### Added
 - This CHANGELOG file to hopefully serve as an evolving example of a standardized open source project CHANGELOG.
 - CNAME file to enable GitHub Pages custom domain