When you think of witches, what comes to mind? Other than your ex-girlfriend, that is. It's probably something resembling the Wicked Witch from The Wizard of Oz (1939), an all-black-everything, pointy-nosed, wart-covered hag who's quick to cast spells and stir cauldrons. Typical. Witches have been given a bad rap in this country since the late 1600