Add wrapping access

[KyLeggiero]

API idea example:

let example = [1, 2, 3, 4]

print(exmaple[wrapping: 5]) // 2
print(exmaple[wrapping: 4]) // 1
print(exmaple[wrapping: 3]) // 4
print(exmaple[wrapping: 2]) // 3
print(exmaple[wrapping: 1]) // 2
print(exmaple[wrapping: 0]) // 1
print(exmaple[wrapping: -1]) // 4
print(exmaple[wrapping: -2]) // 3
print(exmaple[wrapping: -3]) // 2
print(exmaple[wrapping: -4]) // 1
print(exmaple[wrapping: -5]) // 4
print(exmaple[wrapping: -6]) // 3