Remove `speechinput` test

The speech attribute was deprecated in favor of the JavaScript Web
Speech API: https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html.
Add test for the JavaScript 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
* Update metadata for `elem/ruby.js` and `style/scoped.js`