Add ci config file

.gitlab-ci.yml

+before_script:
+  - source activate tango2.7
+
+tests:
+  stage: test
+  script: python setup.py test
+  artifacts:
+    paths:
+      - htmlcov/
+    expire_in: 7 days
+
+pages:
+  stage: deploy
+  script:
+    - mv htmlcov/ public/
+  artifacts:
+    paths:
+      - public
+    expire_in: 7 days
+  only:
+    - master