Stephenie Meyer has the story of her vampire dream down pat: It happened on June 2, 2003, it contained a complicated but coherent conversation and when she woke up, she just had to know what was going to happen next. So she wrote it down. Then Meyer, who had no ambitions for a writing career, just kept writing. The much-anticipated film adaptation of “Twilight” – the first of four books in her series – opens Friday.