add scripts directory and test script

scripts/test_all_case.sh

+#!/bin/bash
+set -o errexit
+
+base_path=$(cd `dirname $0`/..; pwd)
+test_case_path=${base_path}/tests
+
+export PYTHONPATH=$base_path:$PYTHONPATH
+cd ${base_path}
+pip install -r requirements.txt
+cd ${test_case_path}
+
+# only run python test case
+for test_file in `ls | grep \.py`
+do
+	python $test_file
+done