tsuru/tsuru — pull request #919 by msabramo (2014-09-21 18:13:08+00:00)
Title: For failed connect to server, suggest target-add

When user gets "Failed to connect to tsuru server (%s), it's probably down.", suggest that maybe they forgot to run `tsuru target-add ...`, because a common case of getting this error is that the user just installed the tsuru client and they have not pointed it at the right server yet.