Keyboard: Add support for the KBD4x (#4036)

* Generate a new project for the KBD4x

* Specify the possible layouts for the KBD4x - MIT and grid

* Fill out the readme for the KBD4x

* Configure the default keymap and wiring configuration as specified on http://qmkeyboard.cn/

* Add info.json for QMK Configurator

* Enable backlight support for the KBD4x

* Standardise on LAYOUT_planck_mit/LAYOUT_ortho_4x12 layout names

* Add whitespace so the Readme will render correctly

* Disable mouse keys support for the KBD4x to make the firmware small enough

3 files changed, 72 insertions, 0 deletions

diff --git a/keyboards/kbd4x/keymaps/default/config.h b/keyboards/kbd4x/keymaps/default/config.h
new file mode 100644
index 0000000000..7f3bd7dd52
--- /dev/null
+++ b/keyboards/kbd4x/keymaps/default/config.h
@@ -0,0 +1,19 @@
+/* Copyright 2018 sevenseacat
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+// place overrides here
diff --git a/keyboards/kbd4x/keymaps/default/keymap.c b/keyboards/kbd4x/keymaps/default/keymap.c
new file mode 100644
index 0000000000..ad49b37998
--- /dev/null
+++ b/keyboards/kbd4x/keymaps/default/keymap.c
@@ -0,0 +1,52 @@
+/* Copyright 2018 sevenseacat
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+#define ___ KC_TRNS
+
+// Defines the keycodes used by our macros in process_record_user
+enum custom_keycodes {
+  KBD4X = SAFE_RANGE,
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+  [0] = LAYOUT_planck_mit(
+    KC_ESC,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,     KC_Y,   KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+    KC_TAB,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,     KC_H,   KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+    KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,     KC_N,   KC_M,    KC_COMM, KC_DOT,  KC_UP,   KC_ENTER,
+    KC_LCTL, KC_LGUI, KC_1,    KC_2,    KC_3,    KC_SPACE,         MO(1),   KC_SLSH, KC_LEFT, KC_DOWN, KC_RIGHT
+  ),
+
+  [1] = LAYOUT_planck_mit(
+    KC_GRAVE, KC_1,    KC_2,    KC_3,    KC_4,    KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, ___,
+    ___,      RGB_TOG, RGB_MOD, RGB_HUI, RGB_HUD, ___,  ___,  ___,  ___,  ___,  ___,  RESET,
+    ___,      BL_TOGG, BL_STEP, ___,     ___,     ___,  ___,  ___,  ___,  ___,  ___,  ___,
+    ___,      ___,     ___,     ___,     ___,     ___,        ___,  ___,  ___,  ___,  ___
+  ),
+};
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  return true;
+}
+
+void matrix_init_user(void) {
+}
+
+void matrix_scan_user(void) {
+}
+
+void led_set_user(uint8_t usb_led) {
+}
diff --git a/keyboards/kbd4x/keymaps/default/readme.md b/keyboards/kbd4x/keymaps/default/readme.md
new file mode 100644
index 0000000000..a950a25ace
--- /dev/null
+++ b/keyboards/kbd4x/keymaps/default/readme.md
@@ -0,0 +1 @@
+# The default keymap for kbd4x