Passing creation options to form factory with add()

[fabiang]

Hello,

since #45 introduced some BC breaks and was reverted, maybe we could instead pass the creation options for factories as second argument in Zend\Form\Factory::create() and third argument in Zend\Form\Fieldset::add().

What do you think?

[weierophinney]

This repository has been closed and moved to laminas/laminas-form; a new issue has been opened at laminas/laminas-form#4.