Styler corrupts @keyframes sections

Animation definitions like

``` javascript
{
  style:{
    '@keyframes somename': 'from {} to{}'
  }
}
```

are prefixed as other class names during init. Result breaks animations, cause looks like this:

``` html
<style>
@keyframes somename {
  .my-manifest-manid from {}
  .my-manifest-manid to {}
}
</style>
```
