restored the possibility to compile .cf files to gf

src/GF/Command/Importing.hs

@@ -8,6 +8,7 @@ import GF.Grammar.Grammar (SourceGrammar) -- for cc command
 import GF.Infra.UseIO
 import GF.Infra.Option
 import GF.Data.ErrM
+import GF.Source.CF
 
 import Data.List (nubBy)
 import System.FilePath
@@ -17,6 +18,17 @@ importGrammar :: PGF -> Options -> [FilePath] -> IO PGF
 importGrammar pgf0 _ [] = return pgf0
 importGrammar pgf0 opts files =
   case takeExtensions (last files) of
+    ".cf" -> do
+       s  <- fmap unlines $ mapM readFile files 
+       let cnc = justModuleName (last files)
+       gf <- case getCF cnc s of
+               Ok g -> return g
+               Bad s -> error s ---- 
+       Ok gr <- appIOE $ compileSourceGrammar opts gf
+       epgf <- appIOE $ link opts (cnc ++ "Abs") gr
+       case epgf of
+         Ok pgf -> return pgf
+         Bad s -> error s ----
     s | elem s [".gf",".gfo"] -> do
       res <- appIOE $ compileToPGF opts files
       case res of