Add travis config file.

.travis.yml

@@ -0,0 +1,23 @@
+sudo: false
+dist: trusty
+language: python
+cache:
+    pip: true
+    directories:
+        - node_modules
+python:
+    - 2.7
+    - 3.4
+    - 3.5
+    - 3.6
+install:
+    - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`) && source ~/.nvm/nvm.sh && nvm install 8
+    - npm install -g gulp-cli && npm install
+    - pip install pipenv && pipenv install --dev
+before_script:
+    - gulp lint
+    - gulp build
+after_success:
+    - pipenv run coveralls
+notifications:
+    email: false