[mmell] -- Added Automation changes Create Snapshot and Delete Snapshots

@mmell 
-- Added README Snapshots
-- Added RAKE task changes
-- Added cronjob changes
@sachingade20 please add a space after the #. See https://github.com/bbatsov/ruby-style-guide#comments

Do this always, everywhere. Anytime you work on a file that has this problem, please fix it.