SmartyPants not applicable to inline HTML, quotations

This is not a major issue, but currently the only way to render a block quote with a citation footer is to inject HTML in the markdown. However, the smartypants extension in redcarpet doesn't touch the HTML, so if something like this is in the markdown:
```

"One good test is worth a thousand expert opinions."

Wernher Von Braun

```
Then the quotes will not be converted into HTML entities. Obviously this problem is not limited to blockquotes in particular, but any inlined HTML. Like the original smartypants implementation, nothing inside `

`, ``, ``, or `` tag blocks should be modified, but pretty much anything else should be (as far as I know).