******MAINFRAME-SIZED SPOILERS!****** Two years after the homicidal HAL 9000 made its debut in “2001: A Space Odyssey” and 14 years before Skynet is mentioned in “The Terminator,” there was a lesser known but equally dangerous supercomputer-based artificial intelligence known as “Colossus: The Forbin Project” (1970). Based on the book “Colossus” by Dennis Feltham Jones (1918-1981),…