Added changelog.

CHANGELOG.md

+# Changelog
+
+## [2.1.0] - 2018-02-08
+
+### Added
+
+- Alert support
+- Api classifier in build script
+
+
+### Changed
+
+- Facility cards now sorted by open / closed
+- Facility card shadowing
+- Search now includes friendly name
+
+
+### Fixed
+
+- Redux extension support
+- Phone number styling
+- Search engine metadata
+- SciTech campus now works properly
+
+
+## [2.0.1] - 2018-01-23
+
+### Fixed
+
+- Use relative paths for js and css bundles.
+
+
+[2.0.1]: https://git.gmu.edu/srct/whats-open-web/compare/v2.0...v2.0.1
+[2.1.0]: https://git.gmu.edu/srct/whats-open-web/compare/v2.0.1...v2.1
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