Integrate Utils\Slug into Tag::friendlyTitle()

Code for `replace` could be:
```zephir
if replace {
	if typeof replace != "array" && typeof replace != "string"{
		throw new Exception("Parameter replace must be an array or a string");
	}
	let text = str_replace(replace, " ", text);
}
```
but https://github.com/phalcon/zephir/issues/480