New header pic

I decided to go with a new picture for a few reasons. While I love the old picture of the Alliance fleet before Serenity and the Reavers get to them, I felt like I needed a change. And I wanted to honor Battlestar Galactica. The picture I found of the fleet doesn't mesh as well with the background as the original picture did. But I decided that I like the background color too much to change it. Plus I could decide at any minute to go back to the original picture. And I went with the new one because I wanted to keep with the them of a 'Verse. And I think space and spaceships capture that well, plus they are just cool.