travis: add initial .travis.yml file to define the build process

Author: Kátia Nakamura

.travis.yml

@@ -0,0 +1,14 @@
+language: python
+
+python:
+  - "3.6"
+
+branches:
+  only:
+    - master
+
+install:
+  - pip install -r requirements.txt
+
+script:
+  - python manage.py test