Add "Synopsis" column to languages.csv; use config everywhere

I tried to remove all language lists from Haskell and Makefiles

Make.hs

@@ -2,7 +2,7 @@
 
 -- | Main build script for RGL
 
-import Data.List (find,isPrefixOf,isSuffixOf,(\\),unfoldr)
+import Data.List (find,isPrefixOf,isSuffixOf,(\\))
 import Data.Maybe (catMaybes)
 import System.IO (hPutStrLn,stderr)
 import System.IO.Error (catchIOError)
@@ -15,6 +15,7 @@ import System.Directory (createDirectoryIfMissing,copyFile,getDirectoryContents,
 import System.Directory (getModificationTime,setModificationTime)
 #endif
 import Control.Monad (when,unless)
+import Config
 
 main :: IO ()
 main = do
@@ -347,57 +348,6 @@ verbose_switch_short = "-v"
 getFlag :: String -> [String] -> Maybe String
 getFlag flag args = fmap (drop (length flag)) $ find (isPrefixOf flag) args
 
--------------------------------------------------------------------------------
--- Languages of the RGL
-
--- | Path to language config file
-configFile :: FilePath
-configFile = "languages.csv"
-
--- | Information about a language
-data LangInfo = LangInfo
-  { langCode :: String -- ^ 3-letter ISO 639-2/B code
-  , langDir :: String -- ^ directory name
-  , langFunctor :: Maybe String -- ^ functor (not used)
-  , langUnlexer :: Maybe String -- ^ decoding for postprocessing linearizations
-  , langPresent :: Bool
-  , langAll :: Bool
-  , langTry :: Bool
-  , langSymbolic :: Bool
-  , langCompatibility :: Bool
-  } deriving (Show,Eq)
-
--- | Load language information from config file
-loadLangs :: IO [LangInfo]
-loadLangs = do
-  lns <- readFile configFile >>= return . lines
-  mapM mkLangInfo (tail lns)
-  where
-    maybeBit bits n = if length bits >= (n+1) && length (bits !! n) > 0 then Just (bits !! n) else Nothing
-    boolBit bits n def = if length bits >= (n+1) && length (bits !! n) > 0 then (if def then bits !! n /= "n" else bits !! n == "y") else def
-    mkLangInfo s =
-      let bits = separateBy ',' s in
-      if length bits < 2
-      then die $ "Invalid entry in " ++ configFile ++ ": " ++ s
-      else return $ LangInfo
-            { langCode = bits !! 0
-            , langDir = bits !! 1
-            , langFunctor = maybeBit bits 2
-            , langUnlexer = maybeBit bits 3
-            , langPresent = boolBit bits 4 False
-            , langAll = boolBit bits 5 True
-            , langTry = boolBit bits 6 True
-            , langSymbolic = boolBit bits 7 True
-            , langCompatibility = boolBit bits 8 False
-            }
-
--- | Separate a string on a character
--- Source: https://stackoverflow.com/a/4978733/98600
-separateBy :: Eq a => a -> [a] -> [[a]]
-separateBy chr = unfoldr sep where
-  sep [] = Nothing
-  sep l  = Just . fmap (drop 1) . break (== chr) $ l
-
 -------------------------------------------------------------------------------
 -- Executing GF