Returns the distance from the source node to node.
Returns a collection containing the shortest path from the source node to node. The path starts with the source node and includes the edges between the nodes in the path such that if pathTo(node)[i] is an edge, then pathTo(node)[i-1] is the previous node in the path and pathTo(node)[i+1] is the next node in the path.
http://js.cytoscape.org/#eles.dijkstra