App has group counts
API uses rake task to collect and save group counts to DB

* Needs to be tested; Meetup API down
App uses whenever gem to perform cron tasks

* To pull down group count data with limited API calls
App requests 5 cities' group counts every 2 hours
Refactored code to remove MeetupData class variable
App properly queries API for groups, BUT:

* It is only retrieving group counts for
groups within 1 mile of the center of the city
Merge pull request #2 from devindreszer/chron_requests

App pulls group counts, but group count data is off