While “Acasa, My Home” continues to travel the festival circuit – a journey that has included it winning the cinematography award at Sundance, and screening this week at El Gouna in Egypt – and recently secured distribution in North America, its Romanian director Radu Ciorniciuc is hard at work on his next film, “Tata.” Co-directed with “Acasa’s” screenwriter and his partner, Lina Vdovii, it will focus on modern-day slavery.