Base implementation

- [ ] Registration (with csrf)
- [ ] Authentication (with csrf)
- [ ] Optional account activation (Using `Roave\NonceUtility && Roave\EmailTemplates` )
[Element\Csrf::144](https://github.com/zendframework/zf2/blob/master/library/Zend/Form/Element/Csrf.php#L144)

When using forms, csrf validator will be used by default, so, can be removed from input filter :smile: