Merge pull request #300 from steventlamb/topic/refactor_ansible

Topic/refactor ansible
fix deprecated variable syntax
comment update
breakout common ansible OS tasks
fixup last
Only drop database in development provisioning
Restructure command to avoid errors

was getting syntax errors one way, deprecation warnings the other
Uncomment sudo for postgres user commands
Make fab command for runserver match other projs
Initial commit of ansible production role