Fix imports for ghc < 7.10

Language/Haskell/GhcMod/Gap.hs

@@ -49,7 +49,7 @@ import CoreSyn (CoreExpr)
 import Data.List (intersperse)
 import Data.Maybe (catMaybes)
 import Data.Time.Clock (UTCTime)
-import Data.Traversable
+import Data.Traversable hiding (mapM)
 import DataCon (dataConRepType)
 import Desugar (deSugarExpr)
 import DynFlags

Language/Haskell/GhcMod/PathsAndFiles.hs

@@ -25,7 +25,7 @@ import Control.Monad
 import Data.List
 import Data.Char
 import Data.Maybe
-import Data.Traversable
+import Data.Traversable hiding (mapM)
 import Distribution.Helper (buildPlatform)
 import System.Directory
 import System.FilePath

Language/Haskell/GhcMod/Target.hs

@@ -44,7 +44,7 @@ import Data.Maybe
 import Data.Monoid as Monoid
 import Data.Either
 import Data.Foldable (foldrM)
-import Data.Traversable
+import Data.Traversable hiding (mapM, forM)
 import Data.IORef
 import Data.Map (Map)
 import qualified Data.Map  as Map

Language/Haskell/GhcMod/World.hs

@@ -7,7 +7,7 @@ import Language.Haskell.GhcMod.Utils
 
 import Control.Applicative
 import Data.Maybe
-import Data.Traversable
+import Data.Traversable hiding (mapM)
 import System.FilePath ((</>))
 
 import GHC.Paths (libdir)