MATH-867 Modified "encode" and "decode" methods. Unit test "testFitAccuracyDependsOnBoundary" now passes and is thus enabled. Unit test "testConstrainedRosen" had to be modified in order to not fail with the new code (starting point is set closer to the solution).
commons/proper/math/trunk/src/main/java/org/apache/commons/math3/optimization/direct/CMAESOptimizer.java