Merge branch 'master' into smt/planck

* master:
  Clarify license on abnt2 keymap (#1038)
  replace jackhumbert with qmk
  Add gitter image, start update to qmk org
  Remove COLEMAK from preonic_keycodes enum
  layer defines to enum
  Update readme for smt Preonic keymap
  Add smt keymap for Preonic
  updated all the other keymaps to support the new changes.
  fix: infinity60 keyboard was not using quantum features.
  Compare Makefile with itself instead of using `--help`

keyboards/planck/keymaps/default/keymap.c

@@ -14,13 +14,16 @@ extern keymap_config_t keymap_config;
 // The underscores don't mean anything - you can have a layer called STUFF or any other name.
 // Layer names don't all need to be of the same length, obviously, and you can also skip them
 // entirely and just use numbers.
-#define _QWERTY 0
-#define _COLEMAK 1
-#define _DVORAK 2
-#define _LOWER 3
-#define _RAISE 4
-#define _PLOVER 5
-#define _ADJUST 16
+
+enum planck_layers {
+  _QWERTY,
+  _COLEMAK,
+  _DVORAK,
+  _LOWER,
+  _RAISE,
+  _PLOVER,
+  _ADJUST
+};
 
 enum planck_keycodes {
   QWERTY = SAFE_RANGE,