Alan server me

You can now ask alan to 'show <env> servers'.

Quick and dirty to reveal environment info for anyone who needs/wants.  Now people can get ip's for SSH without needing access to chef-repo, etc.  

to be clear, if the exec errors out, we just eat it. could be fine. If you want to prevent that, you could `if / else` on error and stderr and `else` `msg.send(stdout)`