Fixed name of test method for j8ftri chapter 3 exercise 5. It was
incorrectly called exercise 3.
Add some minor whitespace into comments to improve readability.
Create class to make it more convenient to use Pojomatic (when the
client class doesn't need to extend some other class) by
implementing the equals, hashcode, and toString methods and applying the
AutoProperty annotation (which can be overridden by the client class'
use of the Property annotation).
Add solution for J8FTRI chapter 3 exercise 6.