added method to chain input filters

Needed a clean way to chain input filters together 
Addressed and committed
On 12 Jul 2014 12:54 PM, "Aleksey Khudyakov" <notifications@github.com>
wrote:

> In library/Zend/InputFilter/InputFilter.php:
>
> > @@ -62,4 +62,17 @@ public function add($input, $name = null)
> >          }
> >          return parent::add($input, $name);
> >      }
> > +
> > +    /**
> > +     * Chain one InputFilter into the current one
> > +     * @param BaseInputFilter $inputFilter
> > +     * @return $this
> > +     */
> > +    public function chainInputFilter(BaseInputFilter $inputFilter)
> > +    {
> > +        foreach ($inputFilter->getInputs() as $name=>$input) {
>
> formatting issue, missing space around =>
>
> —
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> <https://github.com/zendframework/zf2/pull/6431/files#r14852944>.
>