Evouni has announced a new line of cases for the iPhone 5. One standout design is the Leather Arc Cover, which is made from Italian calfskin leather and comes in three colors: claret, black, and blue. It folds into a viewing stand when needed, and uses a magnetic closure to cover the phone’s screen. Separately, there’s the Leather Arc Wallet case, which is similar to the Arc Cover, adding an inner pocket for cards and cash. No pricing…