Add links to version diffs on changelog

CHANGELOG.md

@@ -4,9 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [Unreleased](https://github.com/consul/consul/compare/v0.10...consul:master)
 
-## [0.10.0] - 2017-07-05
+## [0.10.0](https://github.com/consul/consul/compare/v0.9...v0.10) - 2017-07-05
 ### Added
 - Milestones on Budget Investment's
 - Feature flag to enable/disable Legislative Processes
@@ -17,7 +17,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Localization files reorganization. Check migration instruction at https://github.com/consul/consul/releases/tag/v0.10
 - Rails 4.2.9
 
-## [0.9.0] - 2017-06-15
+## [0.9.0](https://github.com/consul/consul/compare/v0.8...v0.9) - 2017-06-15
 ### Added
 - Budgets
 - Basic polls
@@ -38,7 +38,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - CKEditor locale compilation fixed
 - Fixed bugs in mobile layouts
 
-## [0.8.0] - 2016-07-21
+## [0.8.0](https://github.com/consul/consul/compare/v0.7...v0.8)- 2016-07-21
 ### Added
 - Support for customization schema, vía specific custom files, assets and folders