Single bisection mode

Instead of bisecting all the variables we may bisect only one of the variable. The criteria for determining which of the variable will be bisected is identical to the one presented in section 2.4.1.3 for the mode up to 5. The mode 6 is different: basically we will bisect the variable having the largest diameter except that it is supposed that a weight is assigned to each variable and the diameter used by the bisection process is the diameter of the range for the variable multiplied by the weight of the variable. The weight must be indicated in the vector ALIAS_Bisection_Weight.