test(functional): Move helper functions into util.go
test(functional): Break apart smoke from feature tests
refactor(forward-agent): Rename --agent to --forward-agent
doc(known-hosts): Clarify known-hosts verification docs
test(functional): test fleetctl ssh/journal/status
test(functional): s/t.Fatalf(err.Error())/t.Fatal(err)/
test(functional): Add comment to signature test
Merge pull request #270 from bcwaldon/docs-love

Update feature docs
Merge pull request #265 from bcwaldon/ssh-testing

Add testing of fleetctl actions over ssh
Merge pull request #269 from bcwaldon/agent-forwarding

refactor(forward-agent): Rename --agent to --forward-agent
Merge pull request #268 from bcwaldon/fleetctl-exit-codes

Correctly exit from fleetctl
refactor(fleetctl): Relocate remote command code
refactor(fleetctl): Use local shortcut for status command