Implement MTSP

[guilhermefgs]

• A new approach to solving the multiple traveling salesperson problem using genetic algorithms >300 citations
• A new grouping genetic algorithm approach to the multiple traveling salesperson problem ~150 citations

[guilhermefgs]

I will go for the two-chromosome representation because will not affect any operators

[guilhermefgs]

Need to rewrite all the functions basically to operate the two chromosomes, or a matrix in the way I'm thinking:

• objective functions
• Operators

Break operators into modules (Crossover, Selection and Mutation) to make it easier to read