Update from master

diff --cc Makefile
index fa04e83,4b78218..62c8093
--- 1/Makefile
--- 2/Makefile
+++ b/Makefile
@@@ -24,10 -70,11 +70,11 @@@ DOCKERIZE 
  # Settings
  #
  
- IMPLS = ada awk bash c d clojure coffee cpp crystal cs erlang elixir es6 \
-       factor forth fsharp go groovy guile haskell haxe java julia \
-       js kotlin lua make mal ocaml matlab miniMAL nim perl php ps \
-       python r racket rpython ruby rust scala swift tcl vb vimscript
 -IMPLS = awk bash c d clojure coffee cpp crystal cs erlang elisp \
++IMPLS = ada awk bash c d clojure coffee cpp crystal cs erlang elisp \
+       elixir es6 factor forth fsharp go groovy guile haskell haxe \
+       io java julia js kotlin lua make mal ocaml matlab miniMAL \
+       nim objc objpascal perl php ps python r racket rpython ruby \
+       rust scala swift swift3 tcl vb vimscript
  
  step0 = step0_repl
  step1 = step1_read_print