suppress the waring: "Warning: Permanently added '[localhost]:2022' (RSA) to the list of known hosts."
Merge pull request #200 from aheissenberger/fix/pull/ssh-remove-warning

ssh suppress the waring Permanently added
Minor fixes of boot2docker.go
Whitespace-safe command line in boot2docker.go

It's harder to type, but safer.
Merge pull request #201 from riobard/go

Bugfixes and improved comments