Refactor to overlord being more daemon-like

- Stores k8s machines in etcd in 'deployed' key to track which machines have
  had a stack deployed on them
- Registering minions with the master is now done via API, which itself is
  checked before attempting to register
- Cleanup of code
Revert to 505.1.0 for docker 1.3.1 & fix formatting
Add fix for init key
Add -L
Do curl in build_run
Use ver 509.1.0
Add redirect for etcd PUT as thats how server operates
Set init first
Sleep after setting init
Merge branch 'master' of https://github.com/metral/corekube