Independent entities

What about independent entities without binding to BEM?

Like this:

``` js
{
  block: 'foo',
  content: [
    {tag: 'strong', content: 'HELLO'},
    ',',
    {tag: 'i', content: 'WORLD'},
  ]
}
```

``` html
<div class="foo">
  <strong>HELLO</strong>,<i>WORLD</i>
</div>
```
