default change for experimental ICC profile support; use perceptual
rendering as default, since this is probably a better choice for most
photos. See
http://www.steves-digicams.com/knowledge-center/understanding-rendering-intents.html


git-svn-id: http://svn.montala.net/svn/resourcespace@4246 c08608d7-6e46-0410-86ca-f2a6f1370df5