KILLEEN, Tex. — On Wednesday and Thursday, Maj. Nidal Malik Hasan seemed in a hurry to give his worldly belongings to a neighbor. First a Koran. Then bags of vegetables. Finally a mattress, clothing and odds and ends from his bare one-room flat. “I’m not going to need them,” he told the neighbor, Patricia Villa. He was going to Iraq, he said, or maybe to Afghanistan.That was just one of many small and enigmatic details to emerge Friday about Major Hasan, the 39-year-old Army psychiatrist accused