Rudimentary resource REPL in gf-compiler

src/compiler/gf.cabal

@@ -122,6 +122,7 @@ library
     GF.Grammar.CanonicalJSON
     GF.Compile.ReadFiles
     GF.Compile.Rename
+    GF.Compile.Repl
     GF.Compile.SubExOpt
     GF.Compile.Tags
     GF.Compile.ToAPI
@@ -239,6 +240,12 @@ executable gf
   build-depends: base >= 4.6 && <5, directory>=1.2, gf
   ghc-options: -threaded
 
+executable gfci
+  main-is: gf-repl.hs
+  default-language: Haskell2010
+  build-depends: base >= 4.6 && < 5, gf
+  ghc-options: -threaded
+
 test-suite gf-tests
   type: exitcode-stdio-1.0
   main-is: run.hs