Get synthesis_voice support

[Luke Yelavich]

On Tue, Sep 29, 2015 at 12:25:06PM AEST, Jeremy Whiting wrote:
> Hey all,
> 
> A quick patch to get the current synthesis_voice name. This exposes an
> issue where on startup speech-dispatcher doesn't have any SPDVoice at
> startup, but has one after the synthesis_voice has been set. I
> consider that a separate issue so will add setting that in another
> patch.

As discussed on IRC< I won't apply this till we have things working properly,
i.e with more commits.

Luke