Added Priya Mohan's contest submission
Added Ridhwaan Shakeel's contest submission.
Added Wesley Taylor's contest submission, Wesley won 2nd place.

Wesley's submission was very impressive (and was the most well
documented with README files) and a very close competition with
Pat Smuk. In particular Wesley's solution to problem 4 using a Trie
implemented in Lisp was very well done and had excellent performance
even on large tests.