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/keymaps/default/config.h

@@ -0,0 +1,20 @@
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include "../../config.h"
+
+#define LEADER_TIMEOUT 300
+//#define BACKLIGHT_BREATHING
+#define PREVENT_STUCK_MODIFIERS
+
+#define USE_I2C
+#define SSD1306OLED
+
+/* ws2812 RGB LED*/
+#define RGB_DI_PIN D4
+#define RGBLIGHT_ANIMATIONS
+#define RGBLED_NUM 14     // Number of LEDs
+#define RGBLIGHT_HUE_STEP 10
+#define RGBLIGHT_SAT_STEP 17
+
+#endif