By Gwladys Fouche OSLO (Reuters) – Anders Behring Breivik, the far-right fanatic who killed 77 people in twin attacks in Norway in 2011, remains “very dangerous” and should be kept in isolation in prison, a court heard on Friday. The 44-year-old is suing the Norwegian state in a bid to end his years of isolation in prison and lift restrictions on his correspondence with the outside world. The five-day hearing ends on Friday. Breivik is allowed to say a few words at the end of the hearing and may exercise this right. He has been held in isolation ever since he killed eight people with a car bom…