E. Howard Hunt, the legendary spook who planned the Watergate burglary that took down Richard Nixon in the 1970's, founder of the Operation of Strategic Services (which later became the CIA), and masterminded the execution of Che Guevara in 1967 died of complications of pneumonia yesterday at the age of 88. Hunt was instrumental in planning and executing operations against the Soviets, Cuba, and Guatamala during his career of almost threed decades, and gods only know what else he was involved in that hasn't been declassified yet. After he got out of prison for his role in the Watergate break-in …