Messing with the Xcode file.
Wrap size around NSSizeToCGSize when a CGSize is expected. This quiets a warning in 32-bit code.

Just doing it here in case Apple makes ARC available to 32-bit in the future.
Merge branch 'arc' into XCode4
I don't know why. I guess to let people know that the XCode4 branch uses ARC.
Conflicts:
	SVGImageRep.xcodeproj/project.pbxproj
	SVGImageRep/SVGRenderContext.m
Updating commented-out code.