Updated 'Adult' Jim Nettles card info

Just received back a nice signed Nettles card to add to the collection.  Added a picture and version information for it under the 'Adult' cards tab.  Also cleaned up the C-3PO page and added a link to 'The Card' page.

Fleer Company Info added

Added some info courtesy of Wikipedia about Fleer.  Also added stuff about uncut sheets and cases.