Add proper file header to speechsynthesis.js
Add proper file header to speechsynthesis.js

colinsf/text-to-speech-nodejs,dou800/text-to-speech-nodejs,hmagph/otcnov10demo,dou800/text-to-speech-nodejs,hmagph/text-to-speech-nodejs-with-saucelabs,skaegi/text-to-speech-nodejs-with-saucelabs,hmagph/otcnov10demo,watson-developer-cloud/text-to-speech-nodejs,skaegi/text-to-speech-nodejs-with-saucelabs,hmagph/text-to-speech-nodejs-with-saucelabs,hmagph/text-to-speech-nodejs-with-test,sktay/text-to-speech-nodejs,colinsf/text-to-speech-nodejs,sktay/text-to-speech-nodejs,hmagph/text-to-speech-nodejs-with-test