… by Apple. Similiar for global variable that started with double underscore
…ly install the delta updates.
I've undone all the UTI nonsense: I don't see any reason to use it if the underlying frameworks are just going to do dumber path extension comparison that what I'm already doing. I've switched back to the tried-and-true method. I also made SUUnarchiver* path-based instead of NSURL-based because I realized that the latter didn't make any sense given that we're only unarchiving local files.
Refactored Sparkle's unarchiving system into SUUnarchiver, a factory for SUPipedUnarchiver and SUDiskImageUnarchiver. I removed that nasty cleanUp call by now copying out the contents of the DMG into the /tmp directory and unmounting. Nice! This changed a fair amount so please test with your build and let me know if it explodes things. Works in my tests, though.