Change default image: Machinima

I've uploaded more appropriate for the following article. I shall state my reasons.
 
Machinima- the current icon doesn't make since unless, I guess, you've seen the footage it came from. I've uploaded the design from the Machinima t-shirt from Rooster Teeth; I think it's more universal. If someone just uploaded a frame from the film, it would look more like a sophisticated screenshot.

Done,