Removed Arduino board support and change README to point users to the support in the Arduino_Boards repository.

Author: Brent Wilkins

firmware/README.md

@@ -0,0 +1,14 @@
+//////////////////////////////////////<br />
+/// Serial 7-Segment Display /////////<br />
+//////////////////////////////////////
+
+This folder should live in your Arduino Sketchbook.
+
+Serial 7-Segment Display: This folder contains the Serial 7-Segment Displays firmware and test/example Arduino code.
+
+Support for this board in the Arduino IDE can be found in [this repository](https://github.com/sparkfun/Arduino_Boards/). That adds a "Serial 7-Segment Display" option to the boards menu within Arduino. If you reprogram the Display, you'll need this board selected. Special pin defines were required to make use of new pins 22 and 23 (PB6:7) (in variants/standard/pins_arduino.h). These pins are available on the Serial 7-Segment Display because it runs on the ATmega328's internal 8MHz oscillator.
+
+This project is Open-source!
+
+License: Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0)
+https://creativecommons.org/licenses/by-sa/4.0/