Avoid applying styles to items to HTML, HEAD and items in HEAD

I've got a reset style something like this:

```
* {
margin: 0;
padding: 0;
}
```

the result is:

```

Actionable email


```

I can't think of any reason why you would want to apply styling to items in the head. It might be a good idea to turn this off by default and allow it to be turned on in the options.