message: Updated CHANGELOG for 2.0.0-alpha.27 release.
diff: @@ -11,10 +11,23 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
  Unreleased section, uncommenting the header as necessary.
  -->
  -## Unreleased
  +<!--## Unreleased-->
  +
  +## [2.0.0-alpha.27] - 2017-02-24
  +
  +### Added
  +* Support for `@extends` and `@namespace` jsdoc tags
  +* Analyze inherited members for class-based elements annotated with `@extends`
  +* New Namespace and Reference features
  +* Mixins and namespaces are included in metadata export
  +* Ability to generate metadata for a package and filter exported metadata
  +* Analyze Polymer 2.0 elements that override observedAttributes
  +
  +### Fixed
  * Analyzer will not attempt to load or add warnings for imports which can not be resolved by its urlResolver.
  * Protocol-less URLs such as `//host/path` are properly handled instead of treated as absolute paths.
  -* Add a new 'namespace' feature to support the `@namespace` jsdoc tag.
  +* Infer tagnames from the static `is` getter.
  +* Unified Polymer and Vanilla element scanners
  ## [2.0.0-alpha.26] - 2017-02-22
  * Fix issue with file missing from package.json "files" array.
  