[MERGE] Add -V for ls

[Neil Martinsen-Burrell]

Here's some low-hanging fruit in the UI realm.  We added -V as a 
shortcut for --versioned in the status command.  The attached patch adds 
it for consistency to ls as well.  I was surprised that it wasn't there 
already and had to go look in the help to find out the long name of the 
option.  I think that UI consistency such as this is a Good Thing (TM).

-Neil
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