Make the deprecated functions be defined in the image rep's header.
Updating the Read-me for OS X.
Move the drawing to the NSBitmapImageRep getter, using NSGraphicsPort to draw to the image.
Making the size of the CGContext/NSImageRep be rounded up, in case the size is a fraction.
Merge branch 'master' into arc

Conflicts:
	Source/SVGKImage.m