Ensure Docker support works for external users

[mitalia]

@ldavidson has a Docker branch that is able to stand up Varify in a dedicated Docker container for the purposes of testing (and ultimately dev and production). Our internal Docker support requires our base image registry and etcd, but that will not work for folks who use Varify in an open source manner. @ldavidson should submit a pull request with all the necessary bits to support a standalone Docker implementation for Varify.

[lcdavidson]

In progress.

[lcdavidson]

These updates are in progress on the continuous_deployment branch in collaboration with @hassanNS

[lcdavidson]

Travis CI Build Steps (Proposed):

1. Pull App
2. Create App Container
3. Create DB Container
4. Pull in pre-made archive of a postgres database dump which has sample data already loaded (new manage.py command)
5. Run Syncdb
6. Run migrations
7. Run Unit Test
8. Run Headless Test.

[lcdavidson]

@hassanNS , I have added the prebuilt database dump that we can use for headless testing. https://github.com/cbmi/varify/blob/continuous_deployment/continuous_deployment/data_service/data/varify.pgsql.tar.gz . (Item Number from above) Thanks.