Patch - Control.Monad.Reader documentation

[Andriy Palamarchuk]

Added Haddock documentation. Converted the existing module
documentation to Haddock format. Created examples. Per Jeff Newberns
permission included parts his tutorial "All About Monads" http://haskell.org/all_about_monads/.

See the ticket for details:
http://hackage.haskell.org/trac/ghc/ticket/1410

Haddock output:
http://hackage.haskell.org/trac/ghc/attachment/ticket/1410/Control-Monad-Reader.html?format=raw
http://hackage.haskell.org/trac/ghc/attachment/ticket/1410/Control-Monad-Reader-Class.html?format=raw

Andriy




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