Zend code method prototype

`$reflectionMethod->getPrototype()` will return an array :
```php
'namespace' => 'ZendTest\Code\Reflection\TestAsset',
'class' => 'TestSampleClass12',
'name' => 'doSomething',
'visibility' => 'public',
'return' => 'string',
'arguments' => array(
    'one' => array(
        'type'     => 'int',
        'required' => true,
        'by_ref'   => true,
        'default'  => null,
    ),
    'two' => array(
        'type'     => 'int',
        'required' => true,
        'by_ref'   => false,
        'default'  => null,
    ),
),
```

`$reflectionMethod->getPrototype(MethodReflection::PROTOTYPE_AS_STRING)` will return an string :
```
public string doSomething(int &$one, int $two)
```