Activating Voiceover causes Scroll Reverser to incorrectly reverse the trackpad

[pkmnct]

It seems that the activation of Voiceover causes Scroll Reverser to incorrectly detect the trackpad as a mouse and reverse it. I confirmed this is not due to the setting in #92. After stopping Voiceover, quitting and re-launching Scroll Reverser allows it to work properly again, at least until Voiceover is used again.