This adds a modified copy of the 0.2.1_collect.py script as 0.3_collect.py.

An ansible role `backup` was added to run the script and fetch the output back to the admin's host machine in the ansible_base directory
made the recommended changes from @garrettr
added function to encrypt the backup file in the collect.py script.

modified the backup ansible tasks to fetch the encrypted zip file and secure-delete the zip and encrypted zip off the app server
updated comments with notes from @garrettr and removed the TODOs that were resolved.
Merge pull request #766 from dolanjs/ansible-backup-task

Anisble backup task