Add expression for ChessDB
Wrap yesod-bin so that yesod devel works with Nix
Add Haskell expression for machines
tibia: 10.41

Also I'm personally done with this game so I will no longer maintain the
package.
Merge pull request #2756 from jwiegley/machines

Add Haskell expression for machines
Merge pull request #2755 from jwiegley/yesod-bin

Wrap yesod-bin so that yesod devel works with Nix
Correctly locate Haddocks in hoogle-local expression

On some versions of GHC, documentation is at, for example:

    LIB/share/doc/

In others, it is at:

    LIB/share/doc/x86_64-darwin-ghc7.6.3/

This change will pick up documentation first from the second location, then
from the first.
Merge pull request #2754 from jwiegley/lhfix

Fix to local Hoogle expression
Merge pull request #2753 from jwiegley/chessdb

Add expression for ChessDB
Merge pull request #2772 from Fuuzetsu/tibia

tibia: 10.41
tg/ppl

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