Added changelog. Fixes #23

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/).
+
+## [Unreleased]
+### Added
+- CHANGELOG.md
+
+## [0.1.3] - 2015-03-20
+### Changed
+- Removed ENV usage from the gem.
+
+### Fixed
+- Pointing to specific version of linkurious.js instead of master build
+- Web view html and json files are now generated in the same directory.
+
+### Added
+- Support for credentials via ENV or .fog
+- Capability to exclude egress via opts.yml file.
+
+
+## [0.1.2] - 2015-12-19
+### Added
+- linkurious/sigma.js to render json representation of security groups
+- Capability to exclude CIDR via opts.yml file
+
+
+## [0.1.1] - 2015-10-18
+### Added
+- Capability to generate an opts.yml file to tweak aws-security-viz behavior.
+
+### Removed
+- Support for Ruby 1.9.3
+
+## 0.1.0 - 2015-10-15
+### Added
+- Begin life as the gem [aws_security_viz](https://rubygems.org/gems/aws_security_viz)
+
+
+[Unreleased]: https://github.com/anaynayak/aws-security-viz/compare/v0.1.3...HEAD
+[0.1.3]: https://github.com/anaynayak/aws-security-viz/compare/v0.1.2...v0.1.3
+[0.1.2]: https://github.com/anaynayak/aws-security-viz/compare/v0.1.1...v0.1.2
+[0.1.1]: https://github.com/anaynayak/aws-security-viz/compare/v0.1.0...v0.1.1
+