Add command line test script

.travis.yml

 language: python
 
 python:
-- '2.7'
-- '3.5'
-- '3.6'
+  - '2.7'
+  - '3.5'
+  - '3.6'
 
-script: if [[ $TRAVIS_PYTHON_VERSION != 2.7 ]]; then /bin/bash ./scripts/check_code_style.sh; fi
+script:
+  - if [[ $TRAVIS_PYTHON_VERSION != 2.7 ]]; then /bin/bash ./scripts/check_code_style.sh; fi
+  - /bin/bash ./scripts/test_cml.sh
 
 notifications:
   email:

scripts/test_cml.sh

+#!/bin/bash
+set -o errexit
+base_path=$(cd `dirname $0`; pwd)
+cd $base_path
+
+# test install command
+hub install lac