Added README

README

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+## CmdArduino
+
+by Akiba at Freaklabs.org
+
+The Arduino Command Line Interface, aka CmdArduino, is a simple shell that can
+be run on an Arduino. It's nothing fancy and its main purpose is to allow users
+to easily call their functions on a running Arduino via a simple serial
+terminal. It also allows users to pass in arguments from the command line into
+the functions they wrote so they can easily toggle pins, set blinking speed,
+set pwm duty cycles, or whatever else might need command line user input. Using
+it is fairly simple and just requires unzipping the files into the
+"Arduino/libraries" sub-directory in the Arduino program folder.