[Voiceglue] SSML support (UTF-8 too)

[Doug Campbell]

>>> ...so adding support for SSML would not be that difficult, provided you 
>>> call the voiceglue_tts_gen with the complete SSML document.
>>>     
>>
>> I believe any SSML markup will be passed to the TTS engine unchanged already.
>>   
> 
> No that's not happening, tags are skipped at once, just the text that's 
> a child of <prompt> makes it to the TTS.

OK, sounds like I need to make a fix, then.
I'll put it in the todo list.

Doug Campbell