[GHC] #974: Add isLeft, isRight, fromLeft, fromRight, and splitEithers to Data.Either

[roconnor at theorem.ca]

>>> #974: Add isLeft, isRight, fromLeft, fromRight, and splitEithers to
>>> Data.Either
>>
>> Woohoo! Finally!

I have a patch that was sumbitted using darcs send (as per the 
directions); however it is currently in limbo waiting for moderator 
approval.

-- 
Russell O'Connor                                      <http://r6.ca/>
``All talk about `theft,''' the general counsel of the American Graphophone
Company wrote, ``is the merest claptrap, for there exists no property in
ideas musical, literary or artistic, except as defined by statute.''