First commit.

include/main.h

@@ -0,0 +1,22 @@
+void cmd_length();
+void cmd_fill();
+void cmd_receive();
+void cmd_output();
+void cmd_clear();
+void cmd_version();
+void cmd_get_max();
+void send_nack();
+void send_ack();
+void status_led_on();
+void status_led_off();
+void status_led_toggle();
+
+void setup();
+void loop();
+
+void set_blink(uint8_t mode);
+void blink();
+
+uint8_t receive_byte();
+uint16_t receive_word();
+CRGB receive_color();