Updated the API documentation of the graphics module

sf::Image now uses GL_CLAMP_TO_EDGE instead of GL_CLAMP (removes black border when the image is smooth)

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1511 4e206d99-4929-0410-ac5d-dfc041789085

samples/win32/Win32.cpp

@@ -82,6 +82,7 @@ INT WINAPI WinMain(HINSTANCE instance, HINSTANCE, LPSTR, INT)
     sf::Sprite sprite1(image1);
     sf::Sprite sprite2(image2);
     sprite1.SetOrigin(sprite1.GetSize() / 2.f);
+    sprite1.SetPosition(sprite1.GetSize() / 2.f);
 
     // Create a clock for measuring elapsed time
     sf::Clock clock;