Change CreateCGColorWithSVGColor back to CGColorWithSVGColor.
In CGColorWithSVGColor, use NSColor to make the color, then use its CGColor method to get an autoreleased color method.
No longer have the iOS version of CGColorWithSVGColor return a retained CGColor.
CGFloat is double on 64-bit OSes, init NSNumber accordingly.
Include the SVGKit header in the prefix header
Adding a todo.
For now, return 72 for the pixels per inch on OS X.
Merge branch 'master' into arc

Conflicts:
	Source/DOM classes/Unported or Partial DOM/SVGGradientElement.m