remove common area, prefix roles with pcd-
remove system_dist
replace system_prepare.yml with pcd_prepare_system.yml, use group_by for
platform detection
improve private var handling
add pcd-common role default vars, refactor to use edX CAPITALIZATION
standard
improve adduser task (standardize re-usable task syntax)
register paths and reusable tasks
add pcd concept to Debian-7 system role
WIP; refactor pathing
fix boolean checking
fix tagging in base pcd_system.yml playbook
add note re: denyhosts
added base pcd_application and pcd_service playbooks
remove legacy base playbooks
follow ansible best practices with inventory
httpd service used shared adduser task
allow common services [e.g. mail] to be installed during system
configuration
add site.yml for environment provisioning
fix pcd- namespace in role deps
adduser: only load github_known_host vars once