Added new status format option: oneline to list units & their subordinates.
Revert "Added new status format option: oneline to list units & their subordinates."

This reverts commit 6841d5c80f68bbfc36da088f2d9c987300c64b1f.
Merge branch 'master' of https://github.com/juju/juju
Added new status format option: oneline to list units & their subordinates.
Migrated formatter to its own file. Refactoring.
Merge branch 'master' of https://github.com/juju/juju
Changes from round 2 of reviews.

- Formatters now live in a more specifically named file.
- Fixed nil reference panic with writing out to "out".
- Changed test to be more human-readable.
Merge branch 'master' into status-formatter-oneline
Merge pull request #757 from katco-/status-formatter-oneline

Status formatter oneline

https://docs.google.com/a/canonical.com/document/d/1olIjfnMIKPbNMmNBhfjwlnzdRvY-xBKygpIOhv7QIkE/edit

Fulfills feature "Pretty Printing"
Merge branch 'master' of https://github.com/juju/juju into replicaset-ipv6-fix