TTS fails

[mmberg]

The TTS playback does not work any longer. Same problem as described in http://stackoverflow.com/questions/32053442/google-translate-tts-api-blocked

[mmberg]

Since, even with an API key, Google TTS doesn't work anymore, I decided to use the WebSpeech API instead.

• https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
• https://developers.google.com/web/updates/2014/01/Web-apps-that-talk-Introduction-to-the-Speech-Synthesis-API
• https://developer.mozilla.org/en-US/docs/Web/API/Web_Speech_API/Using_the_Web_Speech_API#Browser_support

Bugfix: 9a2a0ef
Will be merged into master soon.