Corrected the initial value for the product to 1, instead of 0.
Changed the classes ParetoFront and ParetoPolicy to SolutionSet and
Solution, updated documentation and naming inside the classes
accordingly.
Implmeneted several (6) quality metrics in the Judge, and changed the
way the Judge is constructed and how the metrics are used.
Merge branch 'master' of https://github.com/tvkanters/MORL-benchmark.git