(1) new comparator
(2) call in "allMeasures"
(3) re-compute maxAccuracy when not already computed by other measures

1) Average tasks accuracy
2) Average carried tasks accuracy

2) Makes getCompensation() & setCompensation() public
3) Introduces TotalCompensation (Total population compensation in absolute value) as an "allMeasures" recorder

Corrects a bug related to training examples (when different tasks depended on different properties).

A new property is added. "allTasksIrrelevantFeatures", e.g., "0,1-2,3" defines that property 0 and 1 do not play any role on the decisions with respect to the 1st task etc.