Switch to new options handling.

This changes lots of stuff, let me know if it broke anything.

Comments:

- We use a local hacked version of GetOpt that allows long forms of commands to start with a single dash. This breaks other parts of GetOpt. For example, arguments to short options now require a =, and does not allo pace after the option character.

- The new command parsing is currently only used for the program command line, pragmas and the arguments for the 'i' shell command.

- I made a quick hack for the options for showTerm, which currently makes it impossible to use the print style flags for cc. This will be replaced by a facility for parsing command-specific options.

- The verbosity handling is broken in some places. I will fix that in a later patch.

src-3.0/GF/GFCC/PrintGFCC.hs

@@ -5,16 +5,17 @@ import GF.GFCC.Raw.ConvertGFCC (fromGFCC)
 import GF.GFCC.Raw.PrintGFCCRaw (printTree)
 import GF.GFCC.GFCCtoHaskell
 import GF.GFCC.GFCCtoJS
+import GF.Infra.Option
 import GF.Text.UTF8
 
 -- top-level access to code generation
 
-prGFCC :: String -> GFCC -> String
-prGFCC printer gr = case printer of
-  "haskell" -> grammar2haskell gr
-  "haskell_gadt" -> grammar2haskellGADT gr
-  "js" -> gfcc2js gr
-  _ -> printGFCC gr
+prGFCC :: OutputFormat -> GFCC -> String
+prGFCC fmt gr = case fmt of
+  FmtGFCC        -> printGFCC gr
+  FmtJavaScript  -> gfcc2js gr
+  FmtHaskell     -> grammar2haskell gr
+  FmtHaskellGADT -> grammar2haskellGADT gr
 
 printGFCC :: GFCC -> String
 printGFCC = encodeUTF8 . printTree . fromGFCC