Added Julian Winter to the credits for the SDL 2.0 website.

CREDITS.txt

@@ -21,6 +21,8 @@ Thanks to everyone who made this possible, including:
 
 * Pierre-Loup Griffais for his deep knowledge of OpenGL drivers.
  
+* Julian Winter for the SDL 2.0 website.
+
 * Sheena Smith for many months of great work on the SDL wiki creating the API documentation and style guides.
 
 * Paul Hunkin for his port of SDL to Android during the Google Summer of Code 2010.