Vertice : made getConnections return ConnectionsList
AbstractListGraph : fixed issues after changing Vertice
DijkstraAlgo : changed sizeConnections() to size()
AbstractListGraph : renamed getNewConnectionsList() to getNewList();
added getNewConnectionsList(List)
LinkedGraph : renamed getNewConnectionsList to getNewList
SimpleConnectionsList : made public
SimpleConnectionsList : made class to be public
DijkstraGraph : fixed issues with changed Vertice interface
ContractionGraph : fixed issues with changed Vertice interface, created
ContractionConnections, overrided getNewConnectionList
RandomContraction : fixed issues with changed Vertice interface