Update ci config

.travis.yml

 language: python
 
-python:
-  - '2.7'
-  - '3.5'
-  - '3.6'
+jobs:
+  include:
+    - name: "CI on Windows/Python3.6"
+      os: windows
+      python: 3.6
+    - name: "CI on MacOS/Python3.6"
+      os: osx
+      python: 3.6
+    - name: "CI on Linux/Python3.6"
+      os: linux
+      python: 3.6
+    - name: "CI on Linux/Python3.5"
+      os: linux
+      python: 3.5
+    - name: "CI on Linux/Python2.7"
+      os: linux
+      python: 2.7
 
-env:
-  - PYTHONPATH=${PWD}
+install:
+  - pip install --upgrade paddlepaddle
+  - pip install -r requirements.txt
+  - pip install .
 
 script:
   - if [[ $TRAVIS_PYTHON_VERSION != 2.7 ]]; then /bin/bash ./scripts/check_code_style.sh; fi
-  - pip install paddlepaddle; /bin/bash ./scripts/test_cml.sh
+  - /bin/bash ./scripts/test_cml.sh
   - /bin/bash ./scripts/test_all_module.sh
 
 notifications: