Quietly building steam over the last four years, the community project, Philadelphia Assembled, will burst into the world this April, with actions, workshops, performances and art, in places all across the city, and will manifest itself in a big installation at the Philadelphia Museum of Art’s Perelman Building this fall. Starting with a series of conversations with regular Philadelphians, the Dutch artist, Jeanne van Heeswijk, made connections and reached out to more and more people, in what sounds like a revolutionary movement to empower people and make their lives better.