Add changelog to project

Author: Ygg01

CHANGELOG.md

@@ -0,0 +1,16 @@
+# Change Log
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## [0.1.1] - 2016-01-31
+### Added
+  - Add parser based on html5ever
+  - Add namespace parsing
+
+## [0.1.2] - 2016-04-26
+### Added
+  - Quiescent state for interrupting parser from @ConnorGBrewster
+
+### Fixed
+  - Bug in namespace parsing of end tag from @bpowers
+  - Removed mention of `one_input` from README.md from @Ygg01