Rake task to delete all but the 9000 most recent events.
Revert "Rake task to delete all but the 9000 most recent events."

This reverts commit 57a9c30b778947439ec5ffe08d454cbc33b7a981.
Rake task to delete all but the 9000 most recent events.
Merge pull request #3 from challengepost/delete_oldest_events

Delete oldest events