In a rare interview, the Olivier award-winning dramatist discusses her new film, ear for eye, the frustratingly slow pace of progress for black film-makers " and her preference for lower-case letters It is a busy, bright afternoon on London's Southbank, when I meet the lower-case-preferring dramatist debbie tucker green. We're here to discuss her latest film, ear for eye, which will premiere at the BFI's London film …