Get SVGKFastImageView to render right-side-up on OS X.
Make the SVGKLayeredClass render right-side-up. This has the side effect of making the text also right-side-up.
Make the superclass SVGKImageView implement the isFlipped: method instead of the subclasses.
Merge branch 'master' into arc

Conflicts:
	Source/AppKit additions/SVGKImageView.m