tweaks to dock progress indicator
use applicationIconImage instead of NSApplicationIcon
Several code changes (and nib fixes) to allow *most* alerts to show whatever the current NSApp applicationIconImage.  Still we are missing several cases -- more custom alert nibs, plus calls to Begin.*Alert that don't give us a way to change the app icon.
Trying to make dock icon, when re-set, scale properly in UI scaling.  Hmm, not quite it though...
clean up shared graphics. I've added NSCaution since that is 10.6 only
Support NSValueBinding.
ALWAYS copy images when planning to modify them. Especially if they turn out to be lazily generated in some way behind the scenes.
new improved dock progress indicator though you won't see it until we get the app fixed
stop a warning
Use non-deprecated drawing API.
#198703 Draw progress indicator into a 256 pixel version of app icon.
Use imageNamed:NSImageNameApplicationIcon as generic name for app icon.  Copy image so that we can modify its size without any other potential clients being messed up.
Merge pull request #4 from karelia/master

Accept Karelia changes to UKDockProgressIndicator.