Coursework2 initial documents as supplied ...
cw2.pdf from the moodle.
java file downloaded Sat Oct 25 11:40:32 BST 2014 using
wget https://raw.githubusercontent.com/keithmannock/PiJ2014/master/cw2spec/src/FractionTest.java
wget https://raw.githubusercontent.com/keithmannock/PiJ2014/master/cw2spec/src/Fraction.java