Have a single Component.host property which mimics HTML

# Goal

Simplify binding to the host element and get rid of `hostListeners`, `hostProperties`, 'hostActions` properties

``` javascript
@Directive({
  host: {
    'attr-name': 'attr-value',
    '[property]': 'expression',
    '(event)': 'statement',
    '@action': 'statement'
  }
})
```
