Use Whenever to set cron job to get collision data

* Install cron job gem Whenever
* Set cron job to get collision data at 2am every morning
* Remove unnecessary and unfortunate Home model
* Whenever should work on Digital Ocean
* Will have to use Heroku Scheduler instead if using Heroku
Use the new Ruby 1.9 hash syntax.<br>Prefer double-quoted strings unless you need single quotes to avoid extra backslashes for escaping.