Rovio has issued a major update to one of its popular Angry Birds games, Angry Birds Rio. Most notably, version 1.6 of the game features 36 new levels and an all-new episode, the marmoset-filled Market Mayhem. Additionally, players can collect all the hidden fruit to unlock a new bonus level. Angry Birds Rio is currently available for free in the App Store. Google’s Field Trip (free), available for Android since last year, has arrived for iOS.…