add travis

.travis.yml

+language: python
+
+python:
+  - "2.7"
+
+sudo: required
+
+os:
+  - linux
+
+script:
+  - /bin/bash ./run_test.sh
+  - flake8 `find . -name "*.py"`
+
+notifications:
+  email:
+    on_success: change
+    on_failure: always

requirements.txt

+paddlepaddle
+tensorflow
+flake8