Keymap: 4x4 pro micro (#3976)

* 4x4 - pro micro version

* pro-micro setup on 4x4

* tap dance LCTL/RESET key

* remove test file

* more research

* revert a couple un-intended edits

* opt_defs version of adding custom rules.mk variables

* cleanup

* cleanup

* cleanup

* cleanup

* layout edits

* layout edits

* keymap edit

* numpad layout change

* got tap dance layer-switch working

* keymap changes

* temporary revert

* restore previous settings

* misc fixes

* layer order change

* fix layout matrix

* Update tapdances.c

users/wanleg/rules.mk

@@ -1,8 +1,4 @@
-ifeq ($(strip $(KEYBOARD)), lets_split_rev2)
-SRC += ../../keyboards/lets_split/lets_split.c
-endif
-
-SRC += wanleg.c tapdances.c 
+SRC += wanleg.c tapdances.c
 
 TAP_DANCE_ENABLE = yes
 MOUSEKEY_ENABLE = yes
@@ -12,3 +8,9 @@ MOUSEKEY_ENABLE = yes
 ifeq ($(strip $(dfu)), qmk)
     BOOTLOADER = qmk-dfu
 endif
+
+#use alternate settings for 4x4 board using ProMicro instead of Micro
+#usage: make 4x4:wanleg PM=yes
+ifeq ($(strip $(PM)), yes)
+	OPT_DEFS += -DPRO_MICRO
+endif