Update README.md

Author: Sumner-Group

README.md

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 # dijkstra-water-wire
 This is a C / C++ program for Dijkstra's single source shortest
-path algorithm taken from http://www.geeksforgeeks.org/printing-paths-dijkstras-shortest-path-algorithm/, Aditya Goel.
+path algorithm based off of code from http://www.geeksforgeeks.org/printing-paths-dijkstras-shortest-path-algorithm/, by Aditya Goel.
 The code has been modified to calculate water wires connecting a donor and acceptor from an MD simulation.
 Currently, only Amber MD has been tested and the code can use either a pdb trajectory file 
 or an Amber ASCII trajectory file (mdcrd). For a path to be accepted, waters must be within