PoI efficieny improved, testing and clean up to be done
further improvement in selection of best solution
code cleanup and comments addition
fixed original PSO, which was broken by previous midifications
PoI efficiency improved in GreedySearch algorithm
point of interest efficiency improved in all algorithms
comment addition to specify why mutable is used
Merge pull request #24 from ipa-mig-mc/feature/PoI_efficiency_improvement

Feature/po i efficiency improvement