Ever since that first brave soul cut a hole in a slab of dough, shaped that slab into a circle, tossed it in hot oil, pulled it out, sprinkled some sugar on it, and took a bite, human beings have been gaga for donuts. In recent years, donut-mania has ramped up to a whole new level, with boutique shops popping up in cities across the country. Philadelphia hasn't been immune to this craze—the city loves donuts. And everyone in Philadelphia can now celebrate because there's a new donut option in town. It's called Factory Donuts and the founder's a Fox…