Bootstrap chef client with IP-based url
Merge pull request #15 from maoy/url

Bootstrap chef client with IP-based url
Public IP for gateway, checkin chefserver (all VMs), and periodic poll

* chefserver can checkin (knife bootstrap) itself

* add floating ip to gateway

* periodic poll to check whether all servers are up
* print all exceptions in cleanup()

* add SshConnectionError, and catch more specific exceptions in
  polling