UPC-A Barcode Image Generator Program "upc", by Tyler Delgadillo

    This program converts an 11-digit number into a TGA image file representing a UPC-A barcode.

    Invoke at the command line. This program expects an argument in the form of an 11-digit number.
You may include spaces to delimit the number system digit, manufacturer code, and product code.
Additionally, the check digit is calculated automatically.

	Command Line Options:
		-o : specify output filename, defaults to "img.tga"
		-n : include human-readable numeric digits in the image