The Princess of Wales is back behind the camera, carrying on the tradition of taking a sweet photograph of her youngest child on his birthday. Prince Louis turns six today, and Kensington Palace has released a new image of the fourth in line to the throne to mark the occasion. The photograph was taken within the last few days in Windsor. Royal sources have made clear that the photograph was “unedited”, perhaps still recovering from the reaction of photo agencies to the ‘manipulated’ Mother’s Day image of the Princess with her three children. Multiple agencies issued a dramatic “kill” notice, a…