SpeechRecognition test + minor updates 

Summary:

* Removed the `speechinput` test as the speech attribute was replaced with a JavaScript API
* Added test for the JavaScript Speech Recognition API ([test page](http://jsbin.com/OqUTuXo/1))
* Updated the metadata for `elem/ruby.js` and `style/scoped.js`.

--

@stucox can you review this and let me know if I need to change anything? Thanks!