Not include the unnecessary file (SVGKParser.h) in SVGKImage.h so app can contain only it.
Fix the issue “+[NSCharacterSet SVGWhitespaceCharacterSet]: unrecognized selector sent to class 0x1940ff0”.

Replace [NSCharacterSet SVGWhitespaceCharacterSet] with [NSCharacterSet whitespaceAndNewlineCharacterSet].
Remove NSCharacterSet+SVGKExtensions.h and NSCharacterSet+SVGKExtensions.m because SVGWhitespaceCharacterSet may unrecognized in app project.
Enable both non-ARC and ARC mode.
Fix errorEncounteredSAX() for the format type of ‘msg’.
Fix countByEnumeratingWithState() for the parameter type of ‘objects’.