[SDL] CVS Update (gamma ramps)

[Sam Lantinga]

I added lots of gamma improvements in the latest CVS snapshot:
http://www.libsdl.org/cvs.html

Changes for Tue, Aug 29:
 1.1.5: Re-added SDL_SetGamma() using SDL_SetGammaRamp()
 1.1.5: Added gamma ramp support to the DGA video driver
 1.1.5: Finished X11 DirectColor visual support for gamma ramps

Next, I'm going to see if the DGA and X11 video drivers can be merged. :)

See ya!
	-Sam Lantinga, Lead Programmer, Loki Entertainment Software