Chair Entertainment Group has released an update to its highly acclaimed Infinity Blade RPG for the iPhone and iPod touch adding new items and enemies and an in-app purchase feature. Specifically, Infinity Blade 1.1 adds five new swords, five new shields, five new helmets and one new set of armor to be mastered and raises the maximum character level from 40 to 45. A new enemy, the Marrow Fiend has also been added for extra challenges. Users can also…