Integrate with libspiel as dbus Speech Provider

[ranfdev]

The spiel project is defining a standard dbus interface to convert text to speech.

libspiel is getting integrated with the Orca Screen Reader, so that blind users will be able to use any libspiel compatible speech provider.

https://github.com/eeejay/spiel

Your project includes a vast array of speech models, so it would be a perfect candidate to be a reusable speech provider.

[mkiol]

Thanks for the idea.

Very interesting. I'll definitely look into it.