On track to proceed with Linda's changes

Author: lee-naish

src/algorithms/controllers/AStar.js

@@ -1,6 +1,6 @@
 // Copied and modified from dijkstra.js (might have been better to put
 // common code in a single file - they are very similar and could be
-// made moreso).
+// made more-so).
 // If we add support for multiple end nodes elsewhere, we may need to
 // check there is a single end node here
 import GraphTracer from '../../components/DataStructures/Graph/GraphTracer';

src/algorithms/controllers/README_graph_search

@@ -35,4 +35,7 @@ It might be a good idea to pass all the relevant variables all the time for
 consistency.  Basically, you should ideally be able to copy/paste code from
 one chunker.add call to another without having to rename variables, etc.
 
+dijkstra.js has been moved in the right direction wrt the points above
+and AStar.js is a copied and edited version (might have been better to
+generalise some code and use a file with common code).