Remove `speechinput` test

The Speech Input API was deprecated in favor of the Web Speech API.
Also, its only implementation, available in Chrome, will soon be
removed: https://code.google.com/p/chromium/issues/detail?id=223198.
Add test for the Web Speech Recognition API

Web Speech API Specification:
https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
Minor improvements

* Move `websockets.js` into the `websockets` directory and
  rename `binary.js` to `websockets-binary.js`.
* Update metadata for `elem/ruby.js` and `style/scoped.js`.