Cleaning up the branches

[Brian Goetz]

>
>  - When a branch becomes (or is recognized to be) dead, let's rename 
> it to something that makes that clear, such as `dead-x` where `x` is 
> the old name.  (IF `dead` started with `z`, that would be better, as 
> they would all sort to the bottom.)  This is an action that can be 
> done by any committer, so we can all help keep the workshop clean.

Vicente suggested to me that we use `zzz`, to denote a "sleeping" branch 
-- I like that idea.  This is a simple trick that will go a long way.