Peter Jackson's 'The Hobbit' has enjoyed a parade of promotional material up to this point, but an entire scene from the movie? I don't think we've gotten one of those yet. This new clip may be short, but its importance cannot be overlooked. It is the moment in which Bilbo (Martin Freeman) is given his sword Sting by Gandalf (Sir Ian McKellen). Given how much that sword also factors into the 'Lor…