CYB-208 Auto update dev on PR merge

* Quick hacky way to get code update to happen every so often
  based on a cron job.  

  == SHOULD ONLY BE USED ON DEV, *NOT* PRODUCTION ==
* Require a crontab file to run bin/deploy.sh

[CYB-208 Auto update dev on PR merge](https://jira.ets.berkeley.edu/jira/browse/CYB-208)