"View fork" preview should try to use template redirect intelligently

I'm just getting into playing with this plugin, so this might be already being addressed...

I'm trying to use Post Forking for pages on a site where a lot of display properties are determined by page templates, etc. It's not that helpful for the authors who are editing content to be able to preview forks, since the default display falls back to `single.php` and they have to view these pages in the blog post format.

Adding an action on `template_redirect` that sets post variables based on the parent post and loads the appropriate template would be helpful in this case.