Write additional sample tests for odd-sized arrays
Reword context
Add context examples for even-sized number lists
Add algorithm/spec-directory for checking if a number is a prime number
Convert example input to strings
Rework is_prime into a class
Add rspec file for testing EvalPrime class
Add rspec tests for determining if specified numbers are/are not prime
Rename class; refactor is_prime
Test to ensure other_divisors keeps track of other divisors
Define reset_divisors to properly handle resetting @other_divisors