Flocker deploy 121

I would like this to be looked over by someone, for guidance on what needs to be done, and confirmation I'm on the right track.

And, now, the comment on #121 that some of this might not be necessary for now.

There are a couple of inline "TODO"s I'm not sure about.

Fixes #121 
"and" in a test method docstring is usually a mistake.  In this case I don't think it's an interesting conjunction.  You could write every test method's docstring as "Custom config files can be specified and <something else>" and not even be wrong if "Custom config files can be specified" isn't assumed to imply something useful is done with that information.

I suggest this is more of an "If X then Y." situation.  "If paths to configuration files are given then they are saved as ``FilePath`` instances on the options instance."