It blithely ignored unimportant things like what day of the year it is today and
in the DOB.

Note that Java Calendar instances are zero-indexed, so Calendar.set(1990, 12, 1)
sets the object to 1st January 1991, not 1st Dec 1990 (!!)

user guessing when we get stdin working

Plus placeholder for lab 6 exercise 9 (rock-paper-scissors)

Implements an object type - DoubleDivisionResult class to return quotient and remainder

Also add some docstrings and questions

I spotted a neat way of doing this before I had to head off so couldn't resist

Exercise 5 requries stdin so we will come abck to that once I figure out how
best to do that.

Primes generation could be more efficient.

Skips labs 1-3, did them in eclipse which failed to save to OneDrive (!)

Implements Lab and Section classes for more easily and consistently running
particular labs.