add pathdump

demo/mushroom/mushroom.conf

@@ -4,6 +4,8 @@ save_period=0
 
 data = "agaricus.txt.train"
 eval[test] = "agaricus.txt.test"
+test:data =  "agaricus.txt.test"
+
 
 booster_type = 0
 loss_type = 2

demo/mushroom/runexp.sh

@@ -3,4 +3,5 @@ python mapfeat.py
 python mknfold.py agaricus.txt 1
 ../../xgboost mushroom.conf
 ../../xgboost mushroom.conf task=dump model_in=0003.model
+../../xgboost mushroom.conf task=dumppath model_in=0003.model 
 python maptree.py