T ElliottA 'real' portrait of 'Big Eyes' artist Margaret Keaneverified_publisherLos Angeles Times - Jessica GeltMargaret Keane sighs softly and shifts uncomfortably in her seat. She’s just been asked to describe what she felt the first time she saw “Big Eyes,” the new Tim Burton film about her life and her art — paintings of waifish children with weepy saucer eyes that became ubiquitous in the 1960s. Looking …