* interpreter/interpreter.ml: comment
* interpreter/value.ml: estet
* mllibs/run_array.ml: caml_array_concat skeleton
* project.el:
* mllibs/run_array.ml: first version of caml_array_concat, use_array test
now works :)
* interpreter/vm.ml: estet
* interpreter/interpreter.ml: debug last instr
* interpreter/interpreter.ml: show last instr when vm error