+ int processors;
+ string outputDir;
+ map< vector<string>, set<int> > rootForGrouping; //maps a grouping combo to the root for that combo
+ bool includeRoot;
+
+ EstOutput driver(Tree*, vector< vector<string> >, int, int, TreeMap*);
+ EstOutput createProcesses(Tree*, vector< vector<string> >, TreeMap*);
+ double getLengthToRoot(Tree*, int, string, string);