Fix vagrantfile
Rename group_vars file and remove unused files directory
Merge branch 'master' of https://github.com/lyndsysimon/cos-ansible-base into lyndsysimon-master

Conflicts:
	site.yml
Merge branch 'lyndsysimon-master'
Make sure user and ssh roles are executed on all machines
Add test for disallowing password login
Add timezone setup to common tasks
Include variable for enabling/disabling ssh test
Clean up invoke tasks and add "provision" task

This makes it so that the vagrant box and "real" hosts are provisioned
with the same command instead of relying on the black box
"vagrant provision" command
Remove unused playbooks directory

As per @lyndsysimon's conventions in the wiki, playbooks will not go
in the the top-level directory
On second thought, let's keep the playbooks directory for one-off plays
Update README
Add variable to enable/disable mailer checks
Remove more unused roles
Add option for extra variables
Fix mailer checks
Add chkrootkit role
Add "play" invoke task
Merge pull request #7 from CenterForOpenScience/chrootkit

Chrootkit
Put security setup in its own playbook