Group CLI demo into subdirectory. (#6258)

CLI is not most developed interface. Putting them into correct directory can help new users to avoid it as most of the use cases are from a language binding.

demo/CLI/binary_classification/runexp.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+# map feature using indicator encoding, also produce featmap.txt
+python mapfeat.py
+# split train and test
+python mknfold.py agaricus.txt 1
+
+XGBOOST=../../../xgboost
+
+# training and output the models
+$XGBOOST mushroom.conf
+# output prediction task=pred
+$XGBOOST mushroom.conf task=pred model_in=0002.model
+# print the boosters of 00002.model in dump.raw.txt
+$XGBOOST mushroom.conf task=dump model_in=0002.model name_dump=dump.raw.txt
+# use the feature map in printing for better visualization
+$XGBOOST mushroom.conf task=dump model_in=0002.model fmap=featmap.txt name_dump=dump.nice.txt
+cat dump.nice.txt