cli: unembed SousBuild fields
cli: unembed SousBuild fields

- Makes all usage of SousBuild easier to read as don't need to guess
  where methods are coming from.

opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,opentable/sous,samsalisbury/sous,samsalisbury/sous,opentable/sous