Refactored project extensively.

-Solutions to 1-11 working, with tests.
-Base test class, base solution class.
-Base project class with a run all selected method and write timings to
txt file.
Fixed problem 11 solution.

-Added ignore annotation to long running tests.
Added problem 12 and tests.

-Speeded prime factorizer by memoizing.
-Added full (composite) factorizer.
-Added triangular number generator.
-Fixed naming on problem 11 solver.