Tim Gray Senior Vice PresidentAfter concluding his sixth Middle-earth film, “The Hobbit: The Battle of the Five Armies,” Ian McKellen praised Peter Jackson, telling Variety, “He’s invented technology to match his imagination.”Jackson’s first “Lord of the Rings” film, “The Fellowship of the Ring,” premiered in December, 2001, and celebrates its 20th anniversary this month.Jackson oversees five companies in Wellington, New Zealand, that were each started to fill the films’ needs:— Weta Workshop w