make public the html element names map

pkg/polymer/CHANGELOG.md

+#### 0.14.1
+  * The build.dart file no longer requires a list of entry points, and you can
+    replace the entire file with `export 'package:polymer/default_build.dart';`
+    [20396](http://dartbug.com/20396).
+  * Inlined imports from the head of the document now get inserted inside a
+    hidden div, similar to the js vulcanizer [20943](http://dartbug.com/20943).
+
 #### 0.14.0+1
   * Small style improvements on error/warnings page.
 
 #### 0.14.0
   * Upgraded to polymer 0.4.0 ([polymer-dev#d66a86e][d66a86e]).
   * The platform.js script is no longer required in Chrome or Dartium
     (version 36). You can now remove this from your projects for development,
     and it will be injected when running pub build or pub serve. If you would
     like the option to not inject platform.js at all in the built output (if you
     are deploying to chrome exclusively), please star this bug
     http://dartbug.com/20865.
+  * Fixed invalid linter warning when using event handlers inside an
+    `auto-binding-dart` template, [20913](http://dartbug.com/20913).
 
 #### 0.13.1
   * Upgraded error messages to have a unique and stable identifier. This
     requires a version of `code_transformers` newer than `0.2.3`.
   * Upgraded minimum version constraint on `args` to `0.11.0`.
 
 #### 0.13.0+3
   * Added a warning about flashes of unstyled content if we can detect a
     situation that would cause it [20751](http://dartbug.com/20751).
 
@@ skipping 198 matching lines @@
 #### 0.9.2+3
   * fix [15574](https://code.google.com/p/dart/issues/detail?id=15574),
     event bindings in dart2js, by working around issue
     [15573](https://code.google.com/p/dart/issues/detail?id=15573)
 
 #### 0.9.2+2
   * fix enteredView in dart2js, by using custom_element >= 0.9.1+1
 
 [6ad2d61]:https://github.com/Polymer/polymer-dev/commit/6a3e1b0e2a0bbe546f6896b3f4f064950d7aee8f
 [3b690ad]:https://github.com/Polymer/polymer-dev/commit/3b690ad0d995a7ea339ed601075de2f84d92bafd