Supports multi style / link into head or body section

In this case : 

```html
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
	<title>StyleInliner test</title>
	<style type="text/css">
		p{
			color: red;
		}
	</style>
	<link href="css/style.css" rel="stylesheet" type="text/css" media="all">
</head>
```

Only "style" is used. External stylesheet "css/style.css" is not added to the current styles and not removed from hml.