iOS 9.1 adds a taco emoji. All is well with the world.
The new emoji offerings include a unicorn, new smiley faces, devil horns hand, middle finger, and several other graphics—and the long national tragedy of the missing taco emoji has finally been overcome.
Live Photos now senses when you're lifting your camera so the jerky motion at the beginning of a shot isn't an issue. Messages now has an option to not show photos for contacts, and the update also includes compatibility for the soon to be released iPad Pro and updated Apple TV.
iOS 9.1 is a free update. You can install it by going to Settings > General > Software Update on your iOS device, or connect your device to iTunes on your computer.