Downloader for Microsoft™ Text-to-Speech

Microsoft™ Text to speech is a speech service that converts text to lifelike speech. The official Microsoft™ TTS website offers a demo app which you can try to synthesize lifelike speech. However, the synthesized speech can only be played but not be downloaded. This extension adds a download button next to the official 'play' button. Microsoft™ Text-to-Speech website: https://azure.microsoft.com/en-us/services/cognitive-services/text-to-speech