Changes for compatibility with ghc-7.10-rc2

2 modules: Name clashes caused by Applicative-Monad change in Prelude
2 modules: Ambiguities caused by Foldable/Traversable in Prelude
2 modules: Backwards incompatible changes in time-1.5 for defaultTimeLocale
9 modules: {-# LANGUAGE FlexibleContexts #-} (because GHC checks inferred types
           now, in addition to explicitly given type signatures)

Also silenced warnings about tab characters in source files.

src/compiler/GF/Compile/CFGtoPGF.hs

@@ -1,3 +1,4 @@
+{-# LANGUAGE FlexibleContexts #-}
 module GF.Compile.CFGtoPGF (cf2pgf) where
 
 import GF.Grammar.CFG

src/compiler/GF/Compile/Compute/Predef.hs

@@ -93,7 +93,7 @@ delta f vs =
       Occurs  -> fromNonExist vs PFalse   (ap2 occurs)
       ToUpper -> fromNonExist vs NonExist (ap1 (map toUpper))
       ToLower -> fromNonExist vs NonExist (ap1 (map toLower))
-      IsUpper -> fromNonExist vs PFalse   (ap1 (all isUpper))
+      IsUpper -> fromNonExist vs PFalse   (ap1 (all' isUpper))
       Length  -> fromNonExist vs (0::Int) (ap1 (length::String->Int))
       Plus    -> ap2 ((+)::Int->Int->Int)
       EqInt   -> ap2 ((==)::Int->Int->Bool)
@@ -131,8 +131,9 @@ delta f vs =
 
     tk i s = take (max 0 (length s - i)) s :: String
     dp i s = drop (max 0 (length s - i)) s :: String
-    occur s t = isInfixOf (s::String) t
-    occurs s t = any (`elem` t) (s::String)
+    occur s t = isInfixOf (s::String) (t::String)
+    occurs s t = any (`elem` (t::String)) (s::String)
+    all' = all :: (a->Bool) -> [a] -> Bool
 
 boolV b = VCApp (cPredef,if b then cPTrue else cPFalse) []
 

src/compiler/GF/Compile/GrammarToPGF.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE BangPatterns #-}
+{-# LANGUAGE BangPatterns, FlexibleContexts #-}
 module GF.Compile.GrammarToPGF (mkCanon2pgf) where
 
 --import GF.Compile.Export

src/compiler/GF/Compile/PGFtoPython.hs

@@ -6,6 +6,7 @@
 -- exports a GF grammar into a Python module
 -----------------------------------------------------------------------------
 
+{-# LANGUAGE FlexibleContexts #-}
 module GF.Compile.PGFtoPython (pgf2python) where
 
 import PGF(showCId)

src/compiler/GF/Compile/SubExOpt.hs

@@ -21,6 +21,7 @@
 -- 
 -----------------------------------------------------------------------------
 
+{-# LANGUAGE FlexibleContexts #-}
 module GF.Compile.SubExOpt (subexpModule,unsubexpModule) where 
 
 import GF.Grammar.Grammar