Make -new-comp the default and bump the version number to 3.3.11-darcs

* -new-comp (the new partial evaluator) is now chosen by default when you run
  cabal install (or cabal configure). To revert to using the old partial
  evaluator by default, use "cabal install -f-new-comp" (or
  "cabal configure -f-new-comp").

* Regardless of the configured default, you can choose which partial evaluator
  to use when you invoke gf by using the -new-comp or -old-comp command line
  option.

* The cc command in the GF shell uses the chosen partial evaluator by default,
  but you can override this by using "cc -new" or "cc -old".

The plan is that these flags will be romeved in a future version.

gf.cabal

@@ -1,5 +1,5 @@
 name: gf
-version: 3.3.10-darcs
+version: 3.3.11-darcs
 
 cabal-version: >= 1.8
 build-type: Custom
@@ -51,7 +51,7 @@ flag server
 
 flag new-comp
   Description: Make -new-comp the default
-  Default:     False
+  Default:     True
 
 library
   build-depends: base >= 4.2 && <5,

src/compiler/GFI.hs

@@ -184,7 +184,8 @@ execute1 opts gfenv0 s0 =
         (style,q,s) = pOpts TermPrintDefault Qualified ws'
         (new,ws') = case ws of
                       "-new":ws' -> (True,ws')
-                      _ -> (False,ws)
+                      "-old":ws' -> (False,ws')
+                      _ -> (flag optNewComp opts,ws)
 
       case runP pExp (encodeUnicode utf8 s) of
         Left (_,msg) -> putStrLn msg