Add thin-backup plugin

Update to no longer track repo.txt

Gems for everyone.

Although this can be used as part of any DR strategy, the immediate intent is
providing an ability to quickly spin up Jenkins master instances for testing
against. (A user would run the ansible script to create a test instance,
then restore backup .zip which would contain all of the jobs' and master's
configuration.)

ThinBackup plugin doc: https://wiki.jenkins-ci.org/display/JENKINS/thinBackup

Update README.md

updating abbey to use a deployment.yml var file

Working role for review.

Set rbenv tar target to .rbenv instead of /home/jenkins/.rbenv

removing stub code

use ssh_opts

whitespace

whitespace

whitespace

ssh_opts

whitespace

whitespace

Comments

comments.

This will make it consistent with how we pack and unpack the
virtualenv (in terms of directory structure).

Add a play to install alton.

the ansible link is dead.  I changed it from ansible.cc to ansible.com

Jarv/sandbox json config update

Because we are using the `--tags deploy`
using --tags service_variant_config will run
the tasks in that file

Feanil/pre sup hipchat

Jarv/connect to prod clone