also some formatting fixes in the output, renaming jumpbox to bastion

useful for when relying on ssh-agent

- Adds new utility class for DNS entries
- Delays adding records to the end as one batch
- Alters the noop flag to output XML
- Fails if the run would require a delete
- Adds a force flag to make delete explicit

This seperates the git refs from the rest of the vars because the git refs should end up in
the ami document in mongo but the other vars should not.

also adds some clarifying comments

* pep8 updates
* adding more comments
* refactoring
* adding examples