Minor space change.
Have the cached images be of a different class for better management.
Return the value from SVGKImageCached, regardless of if it returned an image or not.
Have SVGKSource have functions for its subclasses that call its subclasses.
Don't use an export list on the debug build.
Merge branch 'master' into arc
Making SVGKImage be ARC again.
Disabled caching on ARC code.
Once again, making it harder and more complex than was necessary.
Merge branch 'master' into arc
Making ARC code use caching.