DONE Allow fangames from all Nintendo properties

[Kritter]

Honestly I'd rather just see the site opened up to "Nintendo General" submissions and given a rename. No sense complicating something that doesn't really need it. Mario Fangames would likely still be the main focus either way because they're the easiest fangames to make and the easiest to find decent resources for. The only real change would be people could find other resources here too, and we'd potentially gain new audiences interested in more than just Mario.