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/Infra/CheckM.hs

@@ -75,7 +75,7 @@ checkCond s b = if b then return () else checkError s
 checkWarn :: Message -> Check ()
 checkWarn msg = Check $ \{-ctxt-} (es,ws) -> ((es,("Warning:" <+> msg) : ws),Success ())
 
-checkWarnings = mapM_ checkWarn
+checkWarnings ms = mapM_ checkWarn ms
 
 -- | Report a nonfatal (accumulated) error
 checkAccumError :: Message -> Check ()