Add mbstring detection

Btw, phar fails now. It seems that hoa is somehow still required outside
test
On Jul 11, 2014 11:16 AM, "Nicolas Grekas" <notifications@github.com> wrote:

> In bin/pickle:
>
> > @@ -17,6 +17,11 @@ if ((!$loader = includeIfExists(__DIR__.'/../vendor/autoload.php')) && (!$loader
> >      exit(1);
> >  }
> >
> > +if (!extension_loaded('mbstring')) {
> > +    echo 'You must install extension mbstring to use Pickle'.PHP_EOL;
> > +    exit(1);
> > +}
> > +
> >  use Pickle\Console\Command;
>
> But composer don't allow providing ext/* things (I hope I'm wrong but
> that's what I remember from previous tests)
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/FriendsOfPHP/pickle/pull/58/files#r14812757>.
>