Creates a layouts/ folder for keymaps shared between keyboards (#1609)

* include variables and .h files as pp directives

* start layout compilation

* split ergodoxes up

* don't compile all layouts for everything

* might seg fault

* reset layouts variable

* actually reset layouts

* include rules.mk instead

* remove includes from rules.mk

* update variable setting

* load visualizer from path

* adds some more examples

* adds more layouts

* more boards added

* more boards added

* adds documentation for layouts

* use lowercase names for LAYOUT_

* add layout.json files for each layout

* add community folder, default keymaps for layouts

* touch-up default layouts

* touch-up layouts, some keyboard rules.mk

* update documentation for layouts

* fix up serial/i2c switches

keyboards/nyquist/rev1/config.h

@@ -18,7 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #ifndef REV1_CONFIG_H
 #define REV1_CONFIG_H
 
-#include "../config.h"
+#include QMK_KEYBOARD_CONFIG_H
 
 /* USB Device descriptor parameter */
 #define VENDOR_ID       0xCEEB

keyboards/nyquist/rev1/rev1.c

@@ -1,4 +1,4 @@
-#include "nyquist.h"
+#include QMK_SUBPROJECT_H
 
 #ifdef AUDIO_ENABLE
     float tone_startup[][2] = SONG(STARTUP_SOUND);

keyboards/nyquist/rev1/rev1.h

@@ -1,7 +1,7 @@
 #ifndef REV1_H
 #define REV1_H
 
-#include "../nyquist.h"
+#include QMK_KEYBOARD_H
 
 //void promicro_bootloader_jmp(bool program);
 #include "quantum.h"

keyboards/nyquist/rev1/rules.mk

@@ -1,5 +1 @@
 BACKLIGHT_ENABLE = no
-
-ifndef QUANTUM_DIR
-	include ../../../Makefile
-endif