Merge pull request #837 from rackerlabs/dev

Pushing to production after reviewing on staging
Merge pull request #846 from rackerlabs/dev

Merging infrastructure changes from dev -> master
Merge pull request #848 from rackerlabs/dev

Merging infrastructure changes from dev -> master
Merge pull request #850 from rackerlabs/dev

Merging infrastructure changes from dev -> master
Pass IP whitelist to lockclb from playbook.
Using yaml.safe_load so only standard YAML tags are parsed.
Merge pull request #852 from ycombinator/kill-ip-access-yml

Pass IP whitelist to lockclb from playbook.
Merge pull request #853 from rackerlabs/dev

Merging infrastructure changes from dev -> master
Specify docroot and backendroot since these are no longer in vars.yml.
Merge pull request #855 from ycombinator/gh-854

Specify docroot and backendroot since these are no longer in vars.yml.
Merge pull request #856 from rackerlabs/dev

Merging infrastructure changes from dev -> master
wip #1