Added a Primes class with a couple functions in it.
Removed #include Primes.h as it was for testing
Problem 3 solved
Completed Problem 4
Problem 5 completed.
Problem 6 completed
Problem 7 Completed (re-use of the Primes class)
Problem 8 completed.
Problem 9 complete.
Added a big integer class (InfInt.h), completed problem 10.