Speed PrimeGenerator by keeping a cache of already calculated primes
Add IterableMonkeyPatchTest and add kCombinations method
Add implementation reference page
Rename IterableMonkeyPatch.groovy to IterableMonkeyPatchTest.groovy
Add problem_12
Rename test files to lowercase and underscores
Speed up prime_factors exponentially by generating numbers rather than collect()ing
Problem 12 - Initial solution
Speed process by using a generator instead of collect()ing