Adds Hadron Keyboard (#1492)

* adding hadron keymaps

* fix embedded comment

* fixed TWI driver path

* Delete glcdfont.c

* Delete ssd1306.c

* Delete ssd1306.h

* Update readme.md

keyboards/hadron/hadron.c

@@ -0,0 +1,26 @@
+#include "hadron.h"
+
+
+void matrix_init_kb(void) {
+
+	matrix_init_user();
+}
+
+void matrix_scan_kb(void) {
+	// put your looping keyboard code here
+	// runs every cycle (a lot)
+	matrix_scan_user();
+}
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+	// put your per-action keyboard code here
+	// runs for every action, just before processing by the firmware
+
+	return process_record_user(keycode, record);
+}
+
+void led_set_kb(uint8_t usb_led) {
+	// put your keyboard LED indicator (ex: Caps Lock LED) toggling code here
+
+	led_set_user(usb_led);
+}