update status for new algorithm logic
Merge pull request #1 from evagabriela/refactor_code

Refactor code to include cleaner code and logic. FYI  This refactor code breaks the initial code-logic that output the following answer: [Rome, Torino, Lyon, Paris, Antwerp, Hamburg, Berlin]
add Dijkstra's algorithm logic comments
Merge branch 'master' of https://github.com/evagabriela/BikeEurope_ruby into dijkstra_algorithm_solution