Add travis-ci settings to build (#43)

* Added travis CI script

* Updated travis CI file

* Update settings and add redis to travis

* Add caching of pip files

.travis.yml

@@ -0,0 +1,20 @@
+# Travis CI
+language: python
+
+python:
+  - "3.6"
+
+cache:
+  - pip
+
+install:
+  - pip install -r requirements.txt
+  - pip install -r dev_requirements.txt
+  - python setup.py develop
+
+services:
+  - redis-server
+
+script:
+  - pushd demo
+  - pytest demo --cov=demo --cov=django_plotly_dash --cov-report term-missing

dev_requirements.txt

@@ -7,7 +7,7 @@ django-redis
 grip
 pandas
 pylint
-pytest
+pytest>=3.6
 pytest-django
 pytest-cov
 pytz