Invert scroll direction if user has set the preference for such in System Preferences.
Revert "Invert scroll direction if user has set the preference for such in System Preferences."

bah, that code crashes

This reverts commit 2497a159677df0ed217e03bc778b14199ca2b5b6.
There, this should invert the swipe direction. I can't test it as I don't have a magic mouse. I'm sure milky will let me know.