Split out formatters into separate packages.

Closes #152.

API changes:

- Skylighting.Core no longer exports Skylighting.Format.ANSI,
  Skylighting.Format.HTML, Skylighting.Format.LaTeX.  These are
  now provided by separate packages, skylighting-format-ansi,
  skylighting-format-blaze-html, skylighting-format-latex.

- Skylighting.Types no longer exports XTerm256ColorCode.
  This has been moved to skylighting-format-ansi.

skylighting-core/README.md

@@ -8,6 +8,10 @@ This package provides the core functionality of the Skylighting project,
 a Haskell syntax highlighting library with support for KDE XML syntax
 highlighting descriptions.
 
+Formatters are no longer included in this package: see
+`skylighting-format-ansi`, `skylighting-format-blaze-html`, and
+`skylighting-format-latex`.
+
 For details on how to use this package, see the Haddock documentation and
 the [Skylighting README](https://github.com/jgm/skylighting/blob/master/skylighting/README.md).
 

skylighting-core/skylighting-core.cabal

@@ -108,9 +108,6 @@ library
                        Skylighting.Styles
                        Skylighting.Loader
                        Skylighting.Tokenizer
-                       Skylighting.Format.ANSI
-                       Skylighting.Format.HTML
-                       Skylighting.Format.LaTeX
   other-modules:       Regex.KDE
                        Regex.KDE.Regex
                        Regex.KDE.Compile
@@ -131,10 +128,8 @@ library
                        xml-conduit >= 1.9.1.0 && < 1.10,
                        safe,
                        base64-bytestring,
-                       blaze-html >= 0.5,
-                       containers >= 0.6.0.1,
-                       ansi-terminal >= 0.7,
-                       colour >= 2.0
+                       colour >= 2.0,
+                       containers >= 0.6.0.1
   hs-source-dirs:      src
   ghc-prof-options:    -fprof-auto-exported
   default-language:    Haskell2010

skylighting-core/src/Skylighting/Core.hs

@@ -10,19 +10,13 @@ module Skylighting.Core (
   , module Skylighting.Regex
   , module Skylighting.Styles
   , module Skylighting.Loader
-  , module Skylighting.Format.ANSI
-  , module Skylighting.Format.HTML
-  , module Skylighting.Format.LaTeX
   ) where
 import Control.Monad
 import Data.List (tails)
 import qualified Data.Map as Map
 import Data.Maybe (listToMaybe)
 import Data.Text (Text)
 import qualified Data.Text as Text
-import Skylighting.Format.ANSI
-import Skylighting.Format.HTML
-import Skylighting.Format.LaTeX
 import Skylighting.Loader
 import Skylighting.Parser
 import Skylighting.Regex