Targa reader/writer is an implementation of Targa
reading and writing code that supports 8-bit
colormapped, grayscale, 16- and 24-bit truecolor
BGR, and 32-bit BGRA, in uncompressed and RLE
compressed formats. It honors Targa's "image
descriptor" bits, performs appropriate error
checking, comes with convenience functions for
converting and manipulating the image in memory,
and overall has a very simple API.
