Added multi graph supports for some algorithms.

script/plugins/MinimumSpanningTree.js

@@ -73,6 +73,7 @@ MinimumSpanningTree.prototype.result = function(resultCallback)
     
     var result = {};
     result["version"] = 1;
+    result["minPath"] = true;
 
     return result;
 }
@@ -145,6 +146,12 @@ MinimumSpanningTree.prototype.getPriority = function()
     return -9.5;
 }
 
+// Algorithm support multi graph
+MinimumSpanningTree.prototype.IsSupportMultiGraph = function ()
+{
+    return true;
+}
+
 
 // Factory for algorithm.
 function CreateMinimumSpanningTree(graph, app)