Sir Paul McCartney has reportedly signed a deal worth an estimated £200 million to bring the Beatles’ back catalog to iTunes. Citing industry insiders, the Daily Mail reports that the deal will bring the much-anticipated release to the store by the end of the year. Due to various deals signed in the past, EMI, Sony and Michael Jackson will all receive a portion of the payout as well. McCartney said last November that he was “pretty sure”…