Remove redundant imports, add TODO's.

src/Config.hs

@@ -2,12 +2,6 @@ module Config (
     autoconfRules, configureRules, cfgPath
     ) where
 
-import Development.Shake
-import Development.Shake.Command
-import Development.Shake.FilePath
-import Development.Shake.Rule
-import Control.Applicative
-import Control.Monad
 import Base
 
 cfgPath :: FilePath
@@ -17,10 +11,10 @@ autoconfRules :: Rules ()
 autoconfRules = do
     "configure" %> \out -> do
         copyFile' (cfgPath </> "configure.ac") "configure.ac"
-        cmd "bash autoconf"
+        cmd "bash autoconf" -- TODO: get rid of 'bash'
 
 configureRules :: Rules ()
 configureRules = do
     cfgPath </> "default.config" %> \out -> do
         need [cfgPath </> "default.config.in", "configure"]
-        cmd "bash configure"
+        cmd "bash configure" -- TODO: get rid of 'bash'