Update CHANGELOG

Author: mmistakes

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+### Added
+- Google Analytics tracking ID, Disqus comments, to `/docs` demo site.
+
+### Changed
+- Permalink structure of `/docs` demo site.
+
 ## [1.0.1] - 2017-03-23
 ### Added
 - Responsive embed helper classes for videos. [#2](https://github.com/mmistakes/jekyll-theme-basically-basic/issues/2)