Add changelog

CHANGELOG.md

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+# Change Log
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## [1.7.12] - 2016-09-08
+### Warning
+**Breaking changes from previous release.**
+- `mdi_tag` icon class attributes format changed from `mdi_tag('one', 'two')` to `mdi_tag('one two')`.
+
+### Added
+- A new option: `class` adds a class attribute to the tag.
+- Add changelog.
+
+### Changed
+- Update to version 1.7.12 of [Material Design Icons][mdi].
+- The version number will henceforth match that of [Material Design Icons][mdi], but may add point releases for bug fixes.
+
+## [0.1.2] - 2016-07-24
+### Changed
+- Simplify `@font-face` declaration since the Rails Asset Pipeline already fingerprints assets.
+- Require newer version of [inline_svg].
+
+## [0.1.1] - 2016-07-23
+### Fixed
+- Revert to previous version of [inline_svg].
+
+## 0.1.0 - 2016-07-23
+### Added
+- Basic Railtie and view helpers to add [Material Design Icons][mdi] tags and inline SVG to Ruby on Rails views.
+
+[1.7.12]: https://github.com/barrymieny/material_design_icons/compare/v0.1.2...v1.7.12
+[0.1.2]: https://github.com/barrymieny/material_design_icons/compare/v0.1.1...v0.1.2
+[0.1.1]: https://github.com/barrymieny/material_design_icons/compare/v0.1.0...v0.1.1
+[mdi]: http://materialdesignicons.com
+[inline_svg]: https://github.com/jamesmartin/inline_svg