Crate permutator

Generic permutator that can get a combination at any specific point.

Functions

divide_factorial	Calculate factorial for two factorial division. It'll return 1 if numerator is smaller or equals to denominator. Otherwise, it'll short circuit the calculation by calculate only the undivided remainder.
factorial	Calculate factorial from given value.
get_cartesian_for	Get a cartesian product at specific location. If objects is [1, 2, 3] and degree is 2 then all possible result is [1, 1], [1, 2], [1, 3], [2, 1], [2, 2], [2, 3], [3, 1], [3, 2], [3, 3]
get_cartesian_size	Calculate all possible cartesian combination size. It is always equals to size.pow(degree).
get_permutation_for	Get permutation at specific location. If objects is [1, 2, 3, 4] and degree is 2 then all possible permutation will be [1, 2], [1, 3], [1, 4], [2, 1], [2, 3], [2, 4], [3, 1], [3, 2], [3, 4], [4, 1], [4, 2], [4, 3].
get_permutation_size	Calculate all possible number of permutation. It's equals to size!/(size - 1).
multiply_factorial	Calculate two factorial multiply on each other. It'll try to reduce calculation time by calculate the common value only once.