IMAGE: Move all ImageDecoders to image/
IMAGE: Move video codecs to image/
IMAGE: Merge the JPEG codec into the ImageDecoder
IMAGE: Clarify difference between ImageDecoder and Codec a bit
IMAGE: Make Codec take a stream reference; change function name to decodeFrame
IMAGE: Split raw bitmap decoding into a Codec
VIDEO: Use the bitmap header compression field for AVI codecs
IMAGE: Share the same pool of codecs between bitmap and AVI
IMAGE: Share the same pool of codecs between PICT and QuickTime
IMAGE: Update comments