Handle faked super and sub script tags

https://s3.amazonaws.com/uploads.hipchat.com/6795/13671/wqQpP6rMgjXhJbM/fake_superscript.docx
https://s3.amazonaws.com/uploads.hipchat.com/6795/13671/Bm82zHa8X28WvgA/fake_subscript.docx
The problem with this solution is that paragraphs don't have character properties. Only runs can have character properties. Also, the run properties could specify a parent style, which could have a size setting. This would cause that value to not be considered.