webcontainer simply displays "html" (instead of text-attribute)

is this a jasonette-web limitation?
afaik as i know this could be something like:

```
var doc = document.createElement('iframe')
doc.open();
doc.write(inlinehtmlAsString);
doc.close();
document.body.appendChild(doc)
```

ps. if webcontainer is already working please provide example-link

Start by reproducing the webcontainer behavior described in the issue and locate the webcontainer implementation; no file or test path is provided. Compare the current rendering of the HTML value with the requested text-attribute behavior, and consider the issue complete when the container displays the intended text and an example link demonstrates it.

Written by the indexing model from the issue text.