[pygame] Scrolling Background - integrate into pygame

[Shandy Brown <sjbrown@xxxxxxxxx>]

Hi Guys.

We had a discussion the other day on IRC about integrating 2 features into
pygame, Scrolling and Animation.

I've got a Scrolling SpriteGroup that I'd like to contribute, but I know
other people have tackled this problem in the past too.  My solution might
be deficient in areas where yours excells.  Let's put our heads together
on this and find the best solution to integrate into pygame.

My code can be read here:
http://sjbrown.users.geeky.net/w/Code/scrollGroup%2epy

sjbrown