DC01 keyboard addition (#3428)

* DC01 initial commit

- Addition of directories
- Left readme

* Initial commit of left half

* Initial files for right half

* arrow

* i2c adjustments

* I2C slave and DC01 refractoring

- Cleaned up state machine of I2C slave driver
- Modified DC01 left to use already pressent I2C master driver
- Modified DC01 matrixes

* Fixed tabs to spaces

* Addition of Numpad

* Add keymaps

- Orthopad keymap for numpad module
- Numpad keymap for numpad module
- ISO, ANSI and HHKB version of keymap for right module

* Minor matrix.c fixes

* Update Readmes

keyboards/dc01/arrow/keymaps/default/keymap.c

@@ -0,0 +1,42 @@
+/* Copyright 2018 REPLACE_WITH_YOUR_NAME
+ *
+ * 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
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[0] = LAYOUT_ALL( /* Base */
+    KC_INS,  KC_HOME,  KC_PGUP, \
+    KC_DEL,  KC_END,   KC_PGDN, \
+                                \
+             KC_UP,             \
+    KC_LEFT, KC_DOWN,  KC_RIGHT \
+),
+};
+
+void matrix_init_user(void) {
+
+}
+
+void matrix_scan_user(void) {
+
+}
+
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  return true;
+}
+
+void led_set_user(uint8_t usb_led) {
+
+}