Adding the ability to disable the creation of control groups and labels on a per-field basis

This change lets you do this on a field:

```
<?=Former::text($id)->unwrapped()?>
```

... to disable the creation of the control-group and label on a single field.  Sometimes my whole form **isn't** inline but I want to present a field or two in a custom way with very particular HTML.

By the way, it's awesome that your bundle is setup to be so flexible that a change like this required only a single new line of code.