Update readme to include vv, the sexy new site wizard.

Correct, typing is hard 

Brad Parbs

> On Dec 15, 2014, at 11:44 PM, Jeremy Felt <notifications@github.com> wrote:
> 
> In README.md:
> 
> > @@ -188,6 +188,7 @@ A bunch of stuff!
> >  Supporting init scripts during provisioning allows for some great extensions of VVV core.
> >  
> >  * [VVV Site Wizard](https://github.com/aliso/vvv-site-wizard) "automates setting up new WordPress sites in Varying Vagrant Vagrants."
> > +* [Variable VV](https://github.com/bradp/vv) automates setting up new sites, setting up deployments, and more.
> s/Variable VV/Variable VVV/, right?
> 
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