Proposal for cli and plugman code rearrangement

[Mark Koudritsky]

A short 
proposal<https://docs.google.com/document/d/1GVtG6BD266dqRURKaS-GEDefb0tBYt56acxrJEKAfmE/edit>
for
how to rearrange cli and plugman code. Let's discuss it during the hangout
today. Feel free to comment.