fix(doc): Fix subgun http service name

The file in the example is called `subgun-http.1.service`, but then the ctl tries to submit and start `subgun.*.service`
Merge pull request #227 from calavera/patch-1

fix(doc): Fix subgun http service name
Merge pull request #226 from unihorn/45

chore(ssh): correct formatting when host key validation failed
refactor(ssh): Replace go.crypto/ssh by gosshnew/ssh
Merge pull request #218 from calavera/ssh_agent_forwarding

refactor(ssh): Replace go.crypto/ssh by gosshnew/ssh
bump(github.com/codegangsta/cli): 3fa24ca4f32