Using a forked version of cookbook 'dmg' fixing Maverick issues when attaching dmg images. Temporary until the pull request is accepted
Using rvm instead of rbenv, and adding rvm recipe (variant of pivotal_workstation)
Ignore .bundle/ folder

Seems to only contain bundler logs which should not be managed by the
git repo
Update foodcritic so it works with Ruby 2 on Travis
Add instructions to send FileVault key to supervisors